Why IEEE feels wrong at first
IEEE is a numeric style. Instead of naming the author and year in your sentence, you put a number in square brackets that points at a position in your reference list. If you learned APA or Harvard first — which most Australian students do, because business and nursing units dominate first year — the habit you have to unlearn is reaching for (Author, Year).
The practical consequence is that your reference list stops being alphabetical and starts being a numbered sequence you cannot reorder once it is written. That single difference causes most of the marks lost on IEEE referencing.
Australian engineering and IT faculties are not uniform about this. Electrical, computer and software units commonly require IEEE; some civil, mechanical and environmental units still use Harvard or APA. Check your unit guide or assessment brief before you format anything, and follow it where it differs from any general guide including this one.
Number sources in the order you first cite them
The first source you cite anywhere in the document is [1], the next new one is [2], and so on. The number belongs to the source permanently: when you cite it again on page nine, it is still [1]. Giving a repeat source a fresh number is the error that most often breaks a reference list, because it leaves you with more entries than sources.
The brackets sit on the line, not raised, and they come before sentence punctuation. You can also use the bracket as part of the sentence rather than as a tag at the end.
- Cite at the end of a clause: the amplifier was unstable above 40 kHz [4].
- Or make the number the subject: reference [4] reports the same instability.
- Several sources at once: [2], [5], [9] — each in its own brackets, not [2, 5, 9].
- A continuous run: [2]–[6], using an en dash rather than a hyphen.
- Do not write "in [4], Smith argues" and also give Smith a second number later.
The source types engineering assessments actually use
Engineering reference lists look different from essay reference lists, because the sources are different. Conference proceedings, standards and datasheets carry real weight in engineering and barely appear in other disciplines, and each has its own element order.
Record the full details while you are researching rather than reconstructing them afterwards. A datasheet revision number or a standard’s year is the kind of detail that is quick to note and slow to recover.
- Journal article: J. K. Author, "Title of paper," Abbrev. Journal Title, vol. 12, no. 3, pp. 45–52, Mar. 2025, doi: 10.0000/xxxxx.
- Conference paper: J. K. Author, "Title of paper," in Proc. Abbrev. Conf. Name, Sydney, NSW, Australia, 2025, pp. 112–118.
- Book: J. K. Author, Title of Book, 3rd ed. Melbourne, VIC, Australia: Publisher, 2024, pp. 88–95.
- Standard: Title of Standard, Standard Number, Year — standards are cited by title and number, not by an author.
- Datasheet: "Component name," Manufacturer, City, Country, Datasheet Rev. B, 2024.
- Technical report: J. K. Author, "Title of report," Organisation, City, Country, Rep. 2025-04, 2025.
- Thesis: J. K. Author, "Title of thesis," M.Eng. thesis, Dept. Elect. Eng., Univ. Name, City, Australia, 2024.
- Online source: J. K. Author, "Title of page," Organisation. [Online]. Available: https://example.com. [Accessed: 9 Oct. 2026].
The reference list is numeric, never alphabetical
Entries appear in citation order, numbered to match the brackets in your text. Sorting an IEEE list alphabetically silently breaks every citation in the document, because the numbers no longer point at the sources you cited — and it is easy to do by reflex, or by letting a reference manager apply an author–date template.
If your word processor or reference manager is set to a Harvard or APA output style, change the style rather than hand-editing the result. Hand-editing produces a list that looks right in the places you checked and wrong everywhere else.
A referencing pass before you submit
Do referencing as its own pass after the technical content is finished. Checking citations while you are still rewriting paragraphs means re-checking them, because moving a paragraph can change which source you cite first.
- Read the document in order and confirm the first appearance of each source is its lowest number.
- Confirm every bracketed number has exactly one reference-list entry, and every entry is cited at least once.
- Confirm no source has two numbers.
- Check initials-before-surname on every entry, not just the first few.
- Check that the list is in numeric order and has not been alphabetised.
- Check any standard, datasheet or report against the actual document rather than a secondary mention of it.
- Where your unit guide specifies something different from the above, follow the unit guide.