APA stylistics- Main points
Check out this presentation file for APA stylistics and guidelines, which has summary of most important areas you need to cover while formatting your documents to APA.
Full style Guidelines- Main points
Check out this compilation of the main points to consider while formatting your papers to APA. This was given by the writing lab at Montana State University, Billings
Full detailed guidelines- by SIT
This detailed manual by Southern Institute of Technology covers all possible aspects of your papers in terms of APA 7th edition; useful for people learning APA for the first time