Citation Guide

How to Format a Citation: A Step-by-Step Guide for Any Style

The parts every citation shares, a six-step method for building a reference entry in any style, how in-text citations work, and the formatting rules that catch students out.

Updated October 2026 · 7 min read

To format a citation, identify the source type, collect its core details, arrange them in your style's order, apply its punctuation and typography, then add a matching in-text citation. The method is the same in every style; only the pattern changes.

This guide breaks a citation into its parts, walks through building one step by step, and shows how APA, MLA, Chicago, Harvard and IEEE present the same source.

The Six Steps to a Correct Citation

  1. Confirm the style and edition your course requires.
  2. Identify the source type: article, book, chapter, web page, report or other.
  3. Collect the details: who, when, what, where published and how to find it.
  4. Arrange them in your style's order for that source type.
  5. Apply punctuation, capitalization and italics.
  6. Add the in-text citation and place the entry in the list in the right order.

The Anatomy of a Citation

Almost every citation answers the same five questions. Learning them makes any style easier, because you only need to learn where each answer goes.

QuestionElementExample
Who?Author, editor or organizationMendes, A.
When?Publication date2023
What?Title of the workRethinking group projects
Where?Container: journal, book, website; plus volume, issue, pages, publisherTeaching Today, 12(1), 30–44
How to find it?DOI or URLhttps://doi.org/10.0000/tt.2023.121

Every in-text citation is a short pointer to one of these full entries, usually the "who" and "when", or a number.

One Source in Five Styles

Here is the same illustrative journal article formatted in five styles. Compare the order of elements, the punctuation and the treatment of titles.

APA 7: Mendes, A., & Kaur, P. (2023). Rethinking group projects. Teaching Today, 12(1), 30–44. https://doi.org/10.0000/tt.2023.121

MLA 9: Mendes, Ana, and Priya Kaur. "Rethinking Group Projects." Teaching Today, vol. 12, no. 1, 2023, pp. 30–44, https://doi.org/10.0000/tt.2023.121.

Chicago (bibliography): Mendes, Ana, and Priya Kaur. "Rethinking Group Projects." Teaching Today 12, no. 1 (2023): 30–44. https://doi.org/10.0000/tt.2023.121.

Harvard (common form): Mendes, A. and Kaur, P. (2023) 'Rethinking group projects', Teaching Today, 12(1), pp. 30–44. Available at: https://doi.org/10.0000/tt.2023.121

IEEE: [1] A. Mendes and P. Kaur, "Rethinking group projects," Teach. Today, vol. 12, no. 1, pp. 30–44, 2023, doi: 10.0000/tt.2023.121.

The details never change. Only their order, punctuation and typography do.

Building a Reference Entry Step by Step

Step 1: Confirm the Style and Edition

Check your brief or course handbook. Editions matter: APA 7 differs from APA 6, MLA 9 from MLA 8, and Chicago 18th from the 17th in small but marked ways.

Step 2: Identify the Source Type

A chapter in an edited book is formatted differently from a whole book, and a report from a web page. Look at what you actually used, not where you found it. A journal article found through Google is still a journal article.

Step 3: Collect the Details

Take details from the source itself: the article's first page, the book's title page, the web page's header and footer. Note authors in full, the exact title and subtitle, the container, volume, issue, pages, publisher, date and DOI or URL.

Step 4: Arrange Them in Order

Follow your style's pattern for that source type. Author-date styles put the year near the start; MLA and Chicago notes-bibliography put it later; IEEE starts with initials.

Step 5: Apply Punctuation and Typography

Apply your style's capitalization (sentence case or title case), italics for the larger work, quotation marks where required, and its punctuation between elements.

Step 6: Place the Entry and Cite It

Add the entry to the list in alphabetical order for author-date styles and MLA, or in order of first citation for numbered styles. Then make sure the in-text citation matches exactly.

The free Bibloq citation generator handles steps 3 to 5 from a DOI, ISBN or URL. Check the result against the source, especially capitalization and author names.

Formatting the in-Text Citation

StyleParaphraseQuotation
APA 7(Mendes & Kaur, 2023)(Mendes & Kaur, 2023, p. 35)
MLA 9(Mendes and Kaur)(Mendes and Kaur 35)
Chicago author-date(Mendes and Kaur 2023)(Mendes and Kaur 2023, 35)
Chicago notesSuperscript number and noteNote with page: 35
Harvard (common form)(Mendes and Kaur, 2023)(Mendes and Kaur, 2023, p. 35)
IEEE[1][1, p. 35]

Narrative citations put the author's name in your sentence: Mendes and Kaur (2023) argue that... This often reads more naturally than a bracket at the end of every sentence.

Where to Place in-Text Citations

A correctly formatted citation in the wrong place can still confuse a reader about which idea came from where. Placement follows a few simple principles.

  • Put the citation next to the borrowed idea, usually at the end of the clause or sentence.
  • In author-date styles, the bracket goes before the full stop: ...in group work (Mendes & Kaur, 2023).
  • In MLA, a citation after a quotation goes after the closing quotation mark and before the full stop.
  • In IEEE, the bracketed number sits inside the sentence, before punctuation: ...as shown in [1].
  • Footnote numbers usually follow punctuation, at the end of the clause or sentence.

Unclear: Group projects build teamwork and often cause conflict, and students prefer individual tasks (Mendes & Kaur, 2023; Ito, 2021).

Clear: Group projects build teamwork (Mendes & Kaur, 2023), although many students still prefer individual tasks (Ito, 2021).

The second version tells the reader exactly which source supports which claim, which is what markers look for.

Formatting Rules That Trip Students Up

  • Capitalization: APA uses sentence case for article and book titles; MLA and Chicago use title case.
  • Author joining: APA uses an ampersand inside brackets and in the list; MLA, Chicago and Harvard use "and".
  • Et al.: APA and MLA use it for three or more authors in the text; Harvard guides vary.
  • Page labels: APA and Harvard use p. and pp.; MLA and Chicago author-date use bare numbers.
  • DOIs: APA writes https://doi.org/...; IEEE writes doi: followed by the number.
  • Missing information: use n.d. for no date in APA, Chicago and Harvard; MLA omits the missing element.

Formatting the Reference List Page

StyleList titleOrderIndent
APA 7ReferencesAlphabeticalHanging, 0.5 inch
MLA 9Works CitedAlphabeticalHanging, 0.5 inch
ChicagoBibliography or ReferencesAlphabeticalHanging
HarvardReference listAlphabeticalOften hanging; follow your guide
IEEEReferencesOrder of first citationNumbers in a column, entries aligned

When Details Are Missing

Real sources are often incomplete. Each style has a fix for the common gaps.

MissingUsual fix
AuthorUse the organization; if none, start with the title
Daten.d. in APA, Chicago and Harvard; omit in MLA
Page numbersUse paragraph numbers, section names or timestamps for quotations
DOIUse a stable URL for online sources, or nothing for print
TitleWrite a short description in square brackets, as APA allows

Final Formatting Checklist

  • One style and edition throughout.
  • Every citation matches an entry, and every entry is cited.
  • Titles in the correct case and typography.
  • Author names in the right format and order.
  • Page numbers on quotations.
  • DOIs and URLs in the style's form.
  • List correctly ordered and indented.

How Bibloq Helps You Format Citations

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You choose a deadline from 3 hours to 20 days and see the price before you pay. Free revisions within the scope of your original request are included.

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Frequently Asked Questions

What are the main parts of a citation?

Author, date, title, the container or publisher details, and a locator such as a DOI or URL. Each style arranges them differently.

What if a source has no date?

Use n.d. in APA, Chicago and Harvard. MLA leaves the date out and may add an access date for web sources.

What if there is no individual author?

Use the organization responsible as the author. If there is none, start the entry with the title.

Do all styles use a hanging indent?

APA, MLA, Chicago and most Harvard guides do. IEEE and Vancouver list numbered entries instead.

Do I format citations differently for a website and a journal article?

Yes. Each source type has its own pattern, so identify the type before formatting.

What is the difference between a citation and a reference?

A citation is the short pointer in your text. A reference is the full entry in the list at the end.

Should I italicize the article title or the journal name?

The journal name, in all major styles. Article titles go in quotation marks in MLA, Chicago and Harvard, and in plain text in APA.

How do I cite a source I found through a database?

Cite it by type, usually as a journal article. Most styles do not need the database name if there is a DOI.

Can I use a citation generator for every source?

Yes, as a first draft. Generators rely on metadata that can be wrong, so check author names, capitalization, dates and page ranges against the source before you submit.