This is a blog actively run by APA style experts. They post recommendations for how to cite specific sources (such as social media sites) as well as general formatting and style guidelines. We recommend these blog posts in particular:
"If you're just starting out, view these free tutorials on APA Style Basics, or the differences between the 5th and 6th editions." Provided by the American Psychological Association, the publisher of the APA manual. Some recommended sections:
Teaches how to format the title page, produce in-text citations, and create a reference page for various types of resources. By Dennis Paoli, Anthony Gonzalez, Caroline Erb, and The Hunter College Reading/Writing Center (City University of New York).
Shows parts of a citation and how those parts will look in APA format. Note: The book example is missing the state abbreviation in the publication information. This is a required element in APA 6th citations.