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APA reference checker: the formatting mistakes that slip past everyone

If you have ever had a paper, report, or manuscript sent back over formatting even though the writing was solid, APA style was probably the reason. Reference-list errors are the most common complaint — and the rules are fiddly enough that even careful writers miss them. Here are the mistakes we see most, and how to catch them before you submit.

The APA reference errors that get flagged most

  • Sentence case vs. title case. Article and book titles in APA 7th edition use sentence case — only the first word, proper nouns, and the first word after a colon are capitalized. Journal names stay in title case. Mixing these up is the single most common error.
  • Missing or wrong italics. Journal names and volume numbers are italicized; the issue number and page range are not. Book titles are italicized; article titles are not.
  • DOIs formatted the old way. APA 7 wants DOIs as full links — https://doi.org/… — not “doi:” followed by the number, and not a bare URL to the publisher’s page when a DOI exists.
  • Author lists. Up to 20 authors are listed in full. For 21 or more, list the first 19, an ellipsis, then the final author. In-text, three or more authors become “et al.” from the first citation.
  • Hanging indent. Every reference entry needs a 0.5-inch hanging indent. It disappears constantly when text is pasted between documents.
  • Alphabetical order. Entries are ordered by the first author’s surname — and “nothing precedes something” (Brown, J. comes before Browning, T.).

Why checking by hand doesn’t work

A typical reference list has twenty or thirty entries, each with six or seven places a rule can break. That is over a hundred chances for an error — and your eyes stop seeing them after the third read-through. Citation generators help, but they regularly produce references that still need manual fixing, which is why university librarians warn writers to double-check generated citations.

Let the scanner check it for you

Style Guide Scanner reads your text against APA 7th edition rules, flags every formatting issue with an explanation, and shows you the corrected version with each change highlighted — so you see exactly what was wrong and why. It also checks Chicago, MLA, AP, and Harvard style.

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