APA Style (7th ed.)
Sentence Case
Sentence case involves capitalizing the first word, first word of a subtitle, and all proper nouns. In APA Style, the titles of journal articles and books should be presented in sentence case within references. See below for examples:
Godfrey, D. (2005). Adapting historical citations to APA Style. Journal of Broadcasting & Electronic Media, 49(4), 544-547. https:// doi.org/10.1207/s15506878jobem4904_15
Graff, G., & Birkenstein, C. (2018). They say/I say: The moves that matter in academic writing (4th ed.). W. W. Norton & Company.
Title Case
Title case involves capitalizing all major words. For example, in APA Style, the title of an essay that appears at the top of the first page of text (see page 2 of the Annotated Student Sample Paper) and journal titles in references are in title case. See below for an example:
Godfrey, D. (2005). Adapting historical citations to APA Style. Journal of Broadcasting & Electronic Media, 49(4), 544-547. https:// doi.org/10.1207/s15506878jobem4904_15
For more information, please see Title Case Capitalization and Sentence Case Capitalization from the APA Style website.