This guide will point you to citation style guides to help you with in-paper citations and reference/works cited styles for MLA, APA, Chicago, Turabian, etc.
The APA Style Blog is the official companion to the Publication Manual of the American Psychological Association, Seventh Edition run by a group of experts who work with APA Style every day.
This list from ACU Writing Center includes several APA 7 style template downloads for a paper in APA 7 style and includes examples of running heads, page numbers, heading, tables, figures, and references.