All APA references consist of four main components:
Author: Who is responsible for the source, it can be both person(s) or organization(s)?
Date: When is the reference from?
Title: What are you referencing?
Source: Where can this reference be found?
Those components are organized as follows: Author. (Date). Title. Source.
George, M. W. (2008). The elements of library research: What every student needs to know. Princeton University Press.
Example 2: a reference to a chapter in a book
Shephered, S. (1988). Shakespeare’s private drawer: Shakespeare and homosexuality. In G. Holderness (Ed.), The Shakespeare myth (pp. 96–110). Manchester University Press.
Example 3: a reference for an article
Reed, M. J., Kennett, D. J., Lewis, T., Lund-Lucas, E., Stallberg, C., & Newbold, I. L. (2009). The relative effects of university success courses and individualized interventions for students with learning disabilities. Higher Education Research & Development, 28(4), 385–400. . https://doi.org/10.1080/07294360903067013
If you are unable to locate components for a reference, the APA Style website has a page on Missing Reference Information.