Library APA Citation Guide (pdf)
APA 7th ed. Crash Course tutorial
Most databases generate citations or provide tips for citing their resources. Consult the database menu under Help, or look for "How to Cite" links.
Other examples
APA Formatting and Style Guide - 7th ed. from the OWL at Purdue University. Includes a printable cheat sheet
APA Citation Guide 7th ed. from Simmons University. Lots of examples, how to format paper and reference list
APA Citation Guide 7th ed. from Columbia College
In the Library Reference Collection
APA - Publication Manual of the American Psychological Association 7th ed.