Why does IEEE order references by citation order instead of alphabetically?

IEEE's numeric system assigns each source a number the first time it is cited in the text, so readers can quickly locate the corresponding full reference without scanning an alphabetical list — the reference list order simply follows the order sources first appear. Our research paper template supports IEEE numbering for engineering and CS papers.

How do I format author names in IEEE style?

Use the author's first initial followed by the surname (e.g. J. M. Smyth), the opposite order from APA, MLA, or Harvard, which list surname first. This is a frequent source of formatting errors when switching between citation styles for different submissions.

Ieee Citation Style Guide

Full name: Institute of Electrical and Electronics Engineers (IEEE)

Citation system: Numeric

Common in: Engineering, computer science, and technical/scientific fields

In-text citation

Cite sources with a bracketed number in the order they first appear in the text — not alphabetically.

Daily journalling has been shown to improve working memory [1].

Direct quote: Multiple sources: "...consistent with earlier findings [1], [3].

References

Number entries in the order they are first cited in the text (not alphabetically), and match every bracketed in-text number to the same number in the reference list.

Source type	Example citation
Book	J. M. Smyth, The Cognitive Journal: Writing for Mental Clarity, 2nd ed. Boston, MA, USA: Academic Press, 2021.
Journal article	L. Garcia and S. Park, "Sleep deprivation and academic performance in first-year students," J. Educ. Psychol., vol. 116, no. 3, pp. 441–458, 2024.
Conference paper	C. Williams, "Metacognition in higher education," in Proc. Int. Conf. Learn. Sci., London, U.K., 2023, pp. 114–138.
Website	American Psychological Association. "Understanding your learning style." APA. Accessed: Jun. 2, 2024. [Online]. Available: https://www.apa.org/topics/learning

Key formatting rules

Reference numbers follow the order of first citation in the text, not the alphabet.
Author initials come before the surname (opposite of APA/MLA/Harvard).
Journal and conference names are commonly abbreviated (e.g. "J. Educ. Psychol.").
Online sources include "[Online]." and an accessed date.

Common mistakes to avoid

Sorting the reference list alphabetically instead of by citation order.
Writing the author name as Surname, First — IEEE uses First Initial. Surname.
Leaving out "[Online]. Available:" before a URL.

WritingBuddy formats every citation in Institute of Electrical and Electronics Engineers (IEEE) style automatically as you write.

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