The APA released the 7th edition of its Publication Manual in October, 2019. This Cal Maritime Library guide refers to the 6th edition, which is probably what your classes are using. If in doubt, check to see if your professor has a preference.
The format varies depending on the type of publication but the basic formula looks like this:
Lastname, F. (date). Title(s) go here. Publisher city/name OR vol(iss)pp OR url.
Within the text of the paper, use parenthetical references to briefly acknowledge the use of another author's material.
The full citation for each parenthetical reference must be included in the reference list.
Page numbers are required for quotation; they are suggested for paraphrased material.
The global debt crisis is having a strong impact on women and children in developing nations (Bronstein, 1982).
Bronstein (1982) contends the global debt crisis is having a strong impact on women and children in developing nations (p. 277).
This decision tree by Harriet L. Schwartz gives you a visual path to follow when you're trying to decide which information needs to be cited in your work. To see a larger version, visit her paper (link below).