Author Guidelines


Ethics in Publishing

Before submitting your manuscript, please read the Indonesian Journal of Energy (IJE) Publication Ethics and Malpractice Statements here. The statements outline the duties and responsibilities of the Author(s) as well as authorship issues: originality, conflict of interest, etc. Please make sure that you comply with the statements when you submit your manuscript to the journal. 

Submission and Publication Agreement

When you submit your manuscript, you are expected to sign our submission and publication agreement form. If your manuscript is selected for publication, then you grant IJE the copyright to publish your manuscript. In principle, copyright of the manuscript still remains with you, the author (or co-Author(s)). When necessary, you must obtain permission to publish material protected by copyright before submitting the manuscript. Please read the Submission and Publication Agreement form here.

Author(s) Rights

For the rights of the Author(s) to reuse his/her work, please refer to our Publication Ethics and Malpractice Statement page here.


The manuscript must use well written and grammatically correct English. You can use American or British English, as long as it is consistent throughout the manuscript. The use of poor English can result in manuscript rejection. When needed, you can use the help of English writing tools, a professional translator or editor. Please do spell-check and grammar-check on your manuscript carefully.

In addition, please use inclusive language. Inclusive language means acknowledgment of diversity, conveys respect to all people, is sensitive to differences and promotes equal opportunities. Author(s) should ensure that writing is free from bias, stereotypes, slang, a reference to the dominant culture and/or cultural assumptions. Please refrain from using descriptors that refer to personal attributes such as age, gender, race, ethnicity, culture, sexual orientation, disability or health condition unless they are necessary, relevant and valid. These guidelines are not exhaustive or definitive by no means and are meant to guide you in the writing process.

New Submission

Submission to this journal is conducted through an online system. You are required to create a new account and drop your manuscript in the upload box. Please submit your manuscript in the .docx format (Microsoft Word format).

Peer Review Policy

For the peer review policy, please refer to our Peer Review Policy page here.

Revised Submissions

The manuscripts that must be revised will be informed through email. You should provide us with an editable file (a .docx format) after you have revised the manuscript. To avoid unnecessary errors, you are strongly advised to use the 'spell-check' and 'grammar-check' functions of your word processor. Please feel free to use a grammar checking tool or consult with a professional translator or editor regarding the language issue.



To write your manuscript, please refer to IJE template which you can download here. The followings outline all the key information that should be included in your manuscript. Example on how to write your manuscript based on the following guideline can be seen on the template as well.

The main text of your manuscript should start on the same page as the abstract.  The text should be indented 25.4 mm/1 inches from the left margin. Font size and formatting should use Times New Roman, 11 pt and single line spacing, with before and after spacing 0 pt.

Essential Title Page Information

Title. It should be concise and informative. Try to avoid abbreviations or formula if possible.

A list of all authors’ names and their affiliations. The order for the names is the given name, followed by the middle name (if there is one) in initials (with periods) and the family name. The authors’ affiliations follow the author’s list. If there is more than one affiliations then a superscripted number should come at the start of each address; each author should also have a superscripted number or numbers following their name to indicate which affiliations, or addresses, are the appropriate ones for them.

Corresponding authors. Email address should be given for the corresponding author at the footer of the first page.


The abstract follows the list of affiliations. The abstract text should be indented 25.4 mm from the left margin. Font size and formatting should use Times New Roman, 10 pt and single line spacing, with before and after spacing 0 pt. As the abstract is not part of the text, it should be complete in itself; no table numbers, figure numbers, references or displayed mathematical expressions should be included.


Following the abstract, the Author(s) must provide a maximum of 5 keywords, avoiding general and plural terms and multiple concepts (avoid, for example, 'and', 'of'). For example, do not use these kinds of keywords: renewable energy and development, economy of Indonesia. Author should write the keywords as such: renewable energy, renewable energy development, economy, Indonesia.

Be sparing with abbreviations: only abbreviations firmly established in the study may be eligible. These keywords will be used for indexing purposes.

In terms of format, please use only capital letters for the first keyword, unless the keyword is the name of a person, brand, country, etc. Please check for more detail here. For example, Keywords: Renewable energy, geothermal fund, nuclear power, Nash’s game theory, Indonesia.

Numbered Sections

Please structure your manuscript into several sections and you are required to number them. For numbering in the Section part, insert a number followed with a period and the Section name. Bold the section name and give one space (enter) in before and after text. For example: “1. Introduction”. For numbering the Subsection part, please insert the first number that indicates the section, followed by a period, a number that indicates the Subsection (with no period after subsection number) and then the Subsection title. The Subsection should be written in italic and given by one space (enter) before and after text, for example: “1.1 Background of the Study”. Both Section and Subsection should be capitalized for the first letter of each word, except for conjunction.


This section should describe the research background and state the research objectives.


This section should provide the detailed methods or materials used to obtain the expected result. Methods that are already published should be summarized, and indicated by a reference.  If quoting directly from a previously published method, use quotation marks and also cite the source. Any modifications to existing methods should also be described.


This section should extend the research background, not repeat what have been written in the introduction.


The result should be concise, clear and answer the research objectives.


This section should explain the significance of result of the research. A combined Results and Discussion section is often appropriate.


The main conclusion should be stated in a clear and concise manner. Author(s) may put suggestions/advices for the next similar researches.


Collate acknowledgments in a separate section at the end of the manuscript before the references and do not include them on the title page, as a footnote to the title. List in the Acknowledgements,  those who provided help during the research (e.g., providing language help, writing assistance or proofreading the manuscript, etc.). You can also acknowledge any fundings or grants that enable you to conduct the research.

Formatting of funding sources

List funding sources in a standard way to facilitate compliance to funder's requirements, as for example:

“Funding: This work was supported by the National Institutes of Health [grant numbers xxxx, yyyy]; the Bill & Melinda Gates Foundation, Seattle, WA [grant number zzzz]; and the United States Institutes of Peace [grant number aaaa].”

It is not necessary to include detailed descriptions on the program or type of grants and awards. When funding is from a block grant or other resources available to a university, college, or other research institution, submit the name of the institute or organization that provided the funding.

If no funding has been provided for the research, please include the following sentence:
This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.”


We advise you to use a reference manager tool, such as Mendeley software. IJE uses the American Psychological Association (APA) style for the reference and in-text citation. Please check the website of APA here for more details.

A complete reference should provide enough information to locate the manuscript mentioned in the printed or digital form. If you are unsure of a particular journal’s abbreviated title, it is best to leave the title in full. The terms loc. cit. and ibid. should not be used. 

Please Note:

  • Please ensure that your manuscript includes a minimum of fifteen (15) references.
  • Out of these references, at least three (3) should be articles indexed in Scopus.
  • We strongly recommend citing articles published within the last ten (10) years.

The following is example of the references using APA style.


Bergmann, I. (1997). Attention deficit disorder. In The New Encyclopedia Britannica (Vol. 26, pp.501-508). Chicago, IL: Encyclopedia Britannica.

Chadwell, F.A., Fisher, D.M. (2016 April-June). Creating open textbooks: A unique partnership between Oregon State University libraries and press and open Oregon State. Open Praxis, 8(2), 123-130. doi:EJ1103945

Cormier, L. S. (1985).  Action responses. In Interview strategies for helpers (2nd ed., pp. 114-118, 121).  Monterey, CA: Brooks.

Dadds, M. R., James, R. C., Barrett, P. M., & Verhulst,  F. C. (2004). Diagnostic issues. In T. H. Ollendick  J. S. March (Eds.), Phobic and anxiety disorders in children and adolescents: A clinician's guide to effective psychosocial and pharmacological interventions (Part 1, pp. 3-33).  Retrieved from ebrary database.

New World Punx. (2014, February 15). A state of trance 650 [Audio file]. Retrieved from

Please visit the APA website for complete information and guide here.


Author(s) may add any appendices, if any, at the end of the manuscript. Appendices includes supporting data, i.e. additional information, data files, tables of extra information or extra figures. If there is more than one Appendix, Author(s) may specifically identify them as A, B, etc.  Formulae and equations in appendices or subsequent appendix (A.1, A.2, B.1 and so on) should be given by a separate numbering: Eq. (A.1), Eq. (A.2), etc. Similarly for tables and figures: Table A.1; Fig. A.1, etc.



Please provide the full form of the abbreviations that are not commonly used in a footnote. You can also give a brief explanation of what the abbreviations mean. Such abbreviations that are unavoidable in the abstract must be defined the first time they are mentioned, as well as in the footnote. Please ensure the consistency of abbreviations throughout the manuscript.


Footnotes should be used sparingly. Number them consecutively throughout the manuscript. Many word processors build footnotes into the text, and this feature may be used. Should this not be the case, indicate the position of footnotes in the text and present the footnotes themselves separately at the end of each page.


Follow internationally accepted rules and conventions: use the international system of units (SI). Please take care that all terminology and notation used will be widely understood. Abbreviations and acronyms should be spelled out in full at their first occurrence in the text. Please use a decimal point to separate comma, and comma to separate thousands (i.e. 1.606 for one point six hundres and six; 1,600 for one thousand and six hundreds). These are some examples on how to write units in a correct form:

  1. USD 50
  2. 80 tons
  3. 1,500 bopd
  4. 20 km
  5. IDR 1,000
  6. 8 liters
  7. 300 GW
  8. 80 0C
  9. 469 MWh
  10. 2,000 Mbtu
  11. etc.

Math formulae

Please submit math equations as editable text and not as images. Present simple formulae in line with normal text where possible and use the solidus (/) instead of a horizontal line for small fractional terms, e.g., X/Y. In principle, variables are to be presented in italics. Powers of “e” are often more conveniently denoted by exp. Please cite all the equations given in the text; otherwise please put them in the Appendix. Number any equations consecutively using a bracket () and use center alignment, regardless of the subsection they are in. For example, see the following:

A + B = C                                                                                                (1)
A/B = E                                                                                                (2)


All figures should be embedded in a correct position within your manuscript, and should also be sent as separate graphics files in their original formats. EPS, TIFF, PSD or PDF formats are preferred. Please use a minimum of 300 dpi pictures the image is submitted in the form of JPEG or PNG files.

Figures should appear in numerical order, be described and mentioned in the body of the text and be positioned close to where they are first cited; otherwise put them in the Appendix. Each figure should have a caption which describes the illustration, and that can be understood independently of the main text. The caption should be given in the text format, not as an image.

Figure Color

There are no restrictions on the use of color in the digital version of your manuscript. However, you should bear in mind that any printed version of your manuscript is likely to be in black and white which may make colored lines difficult to distinguish.

Figure Caption and Number

Captions should be below the figure and separated from it, in a text format. Figures should be numbered sequentially throughout the manuscript, e.g., Figure 1., Figure 2., etc, and should be referred to in the text as Figure 1, Figure 2, and not fig. 1, fig. 2, etc. Captions should be written in Times New Roman, 11 pt, and figures number should be written in Bold.

For captions below the figure, it should be set to the width of the figure for wider figures, centred across the width of the figure. Meanwhile, for narrow figures with wide captions, slightly extended beyond the width of the figure. The caption should finish with a full stop (period).


The following examples show the appropriate format for figure’s position and caption.

Figure 3. Figure with short caption (caption centred).

Figure 4. This is a figure with a caption that is wider than the actual graphic. To save space you can put the caption to the right side of the figure, by placing the graphic and justified caption in a table with one row and two columns.

If a figure is divided into parts, these should be labelled (a), (b), (c) etc. but there should only be one caption for the whole figures, not separate ones for each part.

Figure 5. First figure (a), second figure (b) and third figure (c).


Please submit tables as editable text and not as images. Number the tables consecutively, in accordance with their appearance in the text and place any table notes below the table body.

Tables should appear in numerical order, be described and mentioned in the body of the text and be positioned close to where they are first cited; otherwise put them in the Appendix. Be sparing in the use of tables and please avoid using vertical lines. Each table should have a caption which describes the data, and that can be understood independently of the main text. The caption should be given in the text format, not as an image.

Table Caption and Number

Tables should be centred unless they occupy the full width of the text. Tables should be numbered sequentially throughout the manuscript e.g., Table 1., Table 2., etc, and should be referred to in the text as Table 1, Table 2, and not tab. 1, tab. 2, etc. Captions should be placed at the top of the table, centered and should have a full stop (period) at the end. Except for very narrow tables with a wide caption (see the example below for Table 1) the caption should be the same width as the table. Captions should be written on 11 point and Table number should be boldly written.

Lines in Tables

Tables should have only horizontal lines and no vertical lines. Generally, only three lines should be used: one at the top of the table, one at the bottom, and one to separate the entries from the column headings. Table lines should be 0.5 pt wide.


Because tables can take many forms, it is difficult to provide detailed guidelines; however, the following examples demonstrate our preferred styles.

Table 1. A simple table. Place the caption above the table. Here the caption is wider than the table so we extend it slightly outside the width of the table. Justify the text. Leave 6 pt of space between the caption and the top of the table.


If a table is divided into parts, these parts should be labelled (a), (b), (c), etc. However, there should only be one caption for the whole table, not separate ones for each part.

Table 1. A simple table with condition 1 (a), condition 2 (b) and condition 3 (c). Place the caption above the table. Justify the caption. Leave 6 pt of space between the caption and the top of the table.

Research Data

We encourage and enable you to share data that support your research publication where appropriate. We also allow you to interlink the data with your published manuscripts. Research data refers to the results of observations or experimentation that validate research findings. To facilitate reproducibility and data reuse, we also encourage you to share your software, code, models, algorithms, protocols, methods and other useful materials related to the research. To accommodate this part, we kindly ask you to put it specifically in the Appendix.

To support transparency, we encourage you to state the availability of your data for publicity. This may be a requirement of your funding body or institution. If your data is unavailable to access or unsuitable to post, you are required to inform us during the submission process, for example by stating that the research data is confidential.

Supplementary Materials

We encourage the Author(s) to submit supplementary data attachments to enhance the digital versions of published manuscripts. Supplementary materials typically consist of video clips, animations or supplementary data such as data files, tables of extra information or extra figures.



Before submitting your manuscript, please check the followings:

  1. Ensure that the information of the corresponding author is complete: email address and full postal address;
  2. The manuscript is original and has not been published or considering being published elsewhere;
  3. The manuscript file complies with the given template and has been saved in a .docx format;
  4. The manuscript has been 'spell-checked' and 'grammar-checked'. You can use a grammar checking tool or consult with a professional translator or editor;
  5. References use APA style;
  6. All references mentioned in the Reference list are cited in the text, and vice versa;
  7. Permission has been obtained for the use of copyrighted material from other sources (including the internet).




After the manuscript has followed the process review successfully and is accepted to be published, IJE editorial team will inform the corresponding author through email. The IJE editorial team will send an e-certificate to the corresponding author, including all the co-Author(s) as a token of appreciation. This e-certificate will consist each of the (co)-author’s name, title and DOI of the manuscript. The online published manuscript can be freely accessed and downloaded from the IJE website.

Author(s) Inquiries

For more information, please contact:

Editorial Board - Indonesian Journal of Energy (IJE), Purnomo Yusgiantoro Center (PYC)
Jl. Wijaya IX No.12, RT.2/RW.5, Kelurahan Melawai, Kecamatan Kebayoran Baru, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12160
Tel: +62 (21) 7203917
Whatsapp: +62 811 1888 932