IEEE Citations: How to Format References in a Thesis

What is IEEE citation in a thesis

IEEE citation is a source-formatting system that uses numbers in square brackets, such as [1], [2], or [3]. Each number represents one source in the reference list at the end of your thesis. When you mention the same source in several places, reuse the number already assigned to it instead of assigning a new number.

This style suits a thesis with many sources, especially work in engineering, information technology, econometrics, or quantitative research that cites numerous journal articles. A reader who sees [7] in a sentence can go directly to reference 7 at the end of the chapter or at the end of the full thesis.

You need to separate three tasks that are often grouped under the word citation. The first is citing a source in the paragraph itself. The second is compiling the reference list. The third is checking whether every source cited in the text also appears in the list. A thesis with [4] in the text but no reference 4 at the end still contains a formatting error, and the committee may ask you about it.

IEEE usually numbers sources according to the order in which they first appear in the text. The first source you cite is [1], and the next source is [2]. If reference [1] appears again in Chapter 3, it remains [1]. Your department or university may require a reference list at the end of each chapter or at the end of the full thesis, so check the formatting guide before you finalize the document.

If you are completing a graduation thesis, keep the citation style consistent from the literature review onward. Converting the entire system from APA to IEEE on the final day often creates numbering errors, missing sources, and a long checking session.

The standard structure of IEEE citations and references

An in-text citation usually appears as [reference number]. Put a period or comma after the square bracket unless your university requires another format. For example: This result has been reported in previous studies [1]. If you name the author in the sentence, you still use the number: Nguyen et al. argued that this model fits the research context [2].

When you cite several sources, you can write [1], [3], [5]. Some guides allow [1]-[3] when the cited numbers are consecutive, but use the shortened form only if your department accepts it. Do not mix APA's [1, 2] with IEEE's [1], [2] in the same thesis.

The IEEE reference list is usually presented in numerical order, from [1] to the final reference. Do not reorder it alphabetically if your university's guide requires standard IEEE order. Each source type has its own structure because a book does not have the volume, issue, and page details of a journal article.

Punctuation also needs to remain consistent. Choose a format accepted by your department and apply it to the entire list. Avoid editing each line by intuition, because errors often appear in author names, italics, page numbers, or publication years.

Steps for writing IEEE citations

Step 1: Check your department's official rules

Open your department's thesis formatting guide or ask your supervisor which IEEE variant the university uses. IEEE has several variations for author names, italics, DOI formatting, website citations, and access dates. Online examples can show you the structure, but they do not replace your university's rules.

Create a short note with four points: where the number goes, how references are ordered, whether a DOI is required, and whether a website needs an access date. These four points will save you from repeated corrections after you finish Chapter 4.

Step 2: Build a source list before writing

Create a separate table in Word, Excel, or a reference-management tool. Each row should include a temporary number, author, year, title, source type, URL or DOI, and the chapter where you use the source. Record the information as you read. Do not wait until the end and try to reconstruct every source from memory.

Use a consistent PDF filename, such as Nguyen_2011_phuong-phap-nghien-cuu.pdf. For quantitative research, separate sources used to develop the scale, sources used to explain the model, and sources used to compare your results. This classification makes both the literature review and discussion clearer.

Step 3: Number sources by first appearance

When you write, the first source that appears in Chapter 1 receives [1]. If you use the same source later, find and reuse [1]. Do not assign [8] just because you are reading that source at the current stage of writing.

If you insert a new source in the middle of a chapter, the numbers after that point may need to change. This is why a reference manager or Word's References feature is safer than typing every number manually. If you must work manually, check again from the insertion point through the end of the manuscript.

Step 4: Format a book citation

A basic book reference usually includes the reference number, author name, book title, edition if applicable, place of publication, publisher, and year. Illustrative example: [1] N. D. Tho, Scientific Research Methods in Business. Hanoi: Labor and Social Publishing House, 2011.

For a translated book, check your department's rules for recording the original author, translator, and translated title. For a chapter in an edited book, add the chapter title, editor name, book title, and page range. Do not format a book as a journal article simply because you read one chapter in it.

Step 5: Format journal articles, theses, and websites

A journal article usually requires the author, article title, journal title, volume, issue, pages, and year. If the article has a DOI, record the DOI according to your university's template. For a thesis, include the author, thesis title, thesis type, university name, and year.

A website reference needs the author or organization, page title, website name, publication date if available, URL, and access date if the rules require one. Save a PDF or screenshot of the source information when you use it. A website may change its content or disappear before your defense.

Step 6: Cross-check everything before submission

Search for each [ symbol throughout the manuscript and compare the results with the reference list. Every number in the text must have a matching line in the list. Conversely, every source in the list should be cited at least once, unless your university allows a further-reading list.

Check the details that are easy to miss: whether [01] and [1] have been mixed, whether [2]-[4] really includes all three sources, whether page numbers are missing, and whether a repeated source keeps the same number. Then use check Turnitin to check similarity, while remembering that a similarity report does not confirm that your IEEE formatting is correct.

Usable sentence examples

You can replace the bracketed sections with information from your own topic. These sentences are writing frames, not substitutes for reading the original sources.

How to write this in your thesis: “The [concept name] scale in this study was adapted from [author, year] [reference number] and then adjusted linguistically to fit the context of [study population].” Replace every bracketed section with information you have verified from the original source.

Do not write “according to several studies” and add [4] when reference [4] concerns a very different context. A reviewer may open the source and ask why you generalized that finding to your sample. Accurate citation also means representing the scope of the source accurately.

A shortened IEEE citation example

Assume that you are writing about the intention to use a learning application. In the literature review, you use a methods book, an article on the technology acceptance model, and an article on analytical methods, in that order. The paragraph could read as follows:

“The technology acceptance model explains usage intention through perceived usefulness and perceived ease of use [1]. These variables have been applied in many technology acceptance studies [2]. In quantitative research, a scale needs to be assessed for reliability and validity before the structural model is tested [3].”

The corresponding reference list must preserve the order of first appearance:

1. [1] F. D. Davis, “Perceived usefulness, perceived ease of use, and user acceptance of information technology,” MIS Quarterly, vol. 13, no. 3, pp. 319-340, 1989.
2. [2] V. Venkatesh, M. G. Morris, G. B. Davis, and F. D. Davis, “User acceptance of information technology: Toward a unified view,” MIS Quarterly, vol. 27, no. 3, pp. 425-478, 2003.
3. [3] N. D. Tho, Scientific Research Methods in Business. Hanoi: Labor and Social Publishing House, 2011.

If you mention Davis again in Chapter 3, the number remains [1]. If a new source appears before Davis in a revision, the numbers after it may change. This example shows the ordering structure only. Check the actual edition and source details you use before placing them in your thesis.

When citing analytical thresholds, you also need to preserve the source's meaning. For example, you can write that Cronbach's Alpha from 0.7 upward is generally considered acceptable according to (Nunnally, 1978), but this is an author-year format, not IEEE. If your thesis has chosen IEEE, convert that source to a number such as [8] in the text and give the complete reference in the list. Do not use both systems in the same paragraph.

Common errors that lead to committee questions

The most common error is numbering references alphabetically. IEEE usually follows first appearance, while many students arrange the list by author name and keep the alphabetical numbers. This makes [1] unrelated to the first source cited and may conflict with your department's guide.

The second error is missing information in a book citation. A line containing only “Nguyen Dinh Tho, 2011” is not a complete IEEE reference if the list requires the book title, publication place, and publisher. Separate the short in-text citation from the complete reference line at the end.

The third error is copying a reference from Google Scholar without checking it. The tool may return inconsistent capitalization, incorrect page numbers, a missing DOI, or the wrong edition. Open the original source, check the first page of the article or the publication information, and only then enter it into the reference list.

The fourth error is citing a source you have not read. A paragraph with five references may actually rely on one review article. You may be asked to explain each source when the committee checks the claim. The number of references matters less than the fit between the statement and the source cited.

The fifth error is keeping references after changing the model without reviewing the text. If you remove hypothesis H3, sources used only for H3 may no longer be needed. If you add a new variable, the list needs a foundational source for that variable. Cross-check the references after every model revision, not only before printing.

You can also read the guide to plagiarism to distinguish incomplete citation from copied content. Citing a source does not turn a copied paragraph into your own writing. For a direct quotation, mark the quotation clearly and include the page number if your university requires it.

If you are developing a topic and literature review, see the guide to research topics to check the consistency between your research question, model, and cited sources. The reference list should directly support the argument, scale, and methods used in your study.

Frequently asked questions

What is IEEE citation, and what does [1] mean?

IEEE citation is a system that numbers sources in the text. The number [1] represents the source that first appeared in the manuscript, while the complete information for that source appears on line [1] of the reference list.

When you mention the source again, reuse [1]. Do not create a new number for the same source.

How do you cite a book in IEEE style?

You usually include the reference number, author name, book title, edition if applicable, publication place, publisher, and year. The exact template may differ between universities, so follow the example in your thesis guide.

Check the book title, author, and year against the book or PDF itself. Do not copy an automatically generated reference without correcting capitalization, punctuation, and publication information.

What is a correct citation in a thesis?

A correct citation meets four conditions: the number in the text matches the reference list, the source actually supports the statement, the bibliographic information is complete under the relevant rules, and the same style is used throughout the thesis. Having [4] in the text without a reference [4] at the end is a clear error.

You also need to distinguish an original source from a source that cites it. If you have read only a review article, do not write as though you read the original study. Record the source you actually checked.

Can you cite the same source more than once?

Yes. Reuse the number assigned to that source at every later location. Repeating the number is a feature of IEEE and helps readers identify passages based on the same source.

If you use different pages from the same book, you may add page numbers according to your university's rules, but do not assign a new reference number.

Do you need software for IEEE citations?

You can work manually on a short thesis, but reference-management software reduces errors when you have many sources or revise the manuscript repeatedly. Word, Zotero, and similar tools can help, but you still need to check the output against your department's required format.

Software does not know which source supports your statement. It manages information and formatting, so you remain responsible for checking the content.

Does IEEE citation completely prevent plagiarism?

Correct citation acknowledges the source and reduces the risk of using another person's ideas without credit. It does not turn copied text into original writing and does not guarantee a zero similarity report.

Paraphrase in your own language, mark direct quotations when needed, include page numbers where required, and check the reference list before submission. If you are also revising the thesis structure, see the guide to graduation theses to review how the chapters are organized.

Open your thesis file now, choose the chapter with the most sources, create a cross-check table matching citation numbers to the reference list, and revise it using one consistent IEEE template. If you need to check formatting and chapter writing in the same manuscript, use module M5 at DoThesis.