APA released a new version, the 7th edition, in late 2019. Most professors now require students to follow the new 7th edition of APA style. The APA 7th Edition guide is a great resource for you.
A few professors are still using the 6th edition of APA style. This mostly applies to EdD students who entered the program in Summer 2020 or earlier (Cohorts 1, 2, and 3). If you have been specifically instructed to use APA 6, click the APA 6th Edition tab in this guide for more resources.