APA is the style that was first created and used by the American Psychological Association. It's mostly used in the fields of:
APA uses in-text citations with the author's last name and the year of publication (such as: Smith, 2020), with a reference list at the end that contains full citations for each source, in alphabetical order by author last name.
Academic Writer -- The Tarleton State University community has access to Academic Writer; it is a database that supports APA users with online tutorials, sample papers, grammar and usage help, and a citation generator.