APA is short for American Psychological Association.
APA Style is commonly used to cite sources within the Social Sciences. Although there are thousands of citation styles to choose from, they may vary with disciplines, with publishers, etc. You may need to speak with your professor about what style you should use for your assignment but remember to be consistent with your style and only use one style throughout your assignment. Explore this guide to learn more about how to cite using APA style.
The video below provides an overview of the basics of formatting papers using the APA Style:
Video courtesy of CSUDH Library (3 minutes)
Publication Manual of the American Psychological Association by 
