What are APA capitalization rules?

APA capitalization rules depend on what part of a paper you are writing. In the body of the text, standard capitalization rules should be followed (e.g., capitalize proper nouns and lowercase common nouns).

For titles of works and headings, APA Style uses two types of capitalization:

  • In title case, all words are capitalized except for articles and prepositions and conjunctions of three letters or fewers.
  • In sentence case, only the first word and any proper nouns are capitalized.
Title case vs sentence case in APA Style
Use Examples
Title case Titles of articles, books, and other works in the body of the text Freud’s The Interpretation of Dreams was a seminal influence …
The title of the paper itself Depression and Anxiety in Students Experiencing Homelessness
Headings and figure and table titles Theoretical Background
Titles of journals and other periodicals on the reference page Journal of Personality and Social Psychology
Sentence case Titles of articles, books, reports, and webpages on the reference page Stellar, J. E., & Willer, R. (2018). Unethical and inept? The influence of moral information on perceptions of competence. […]
Table column headings and entries, table and figure notes Number of participants