The main book that you need to cite your sources and format your work in the American Psychological Association (APA) style is the Publication Manual of the American Psychological Association (7th ed.):
Find it behind the Reference Desk.
To get you started, here's the format for citing the most common types of resources in your APA Style Reference List:
Book
Article from a Database
Web Page
Personal interviews do not need to be included in the reference list, but they should be cited in your text.
(Interviewee first initial. Last Name, personal communication, Month day, year)
(C. Smith, personal communication, January 11, 2017)
Don't forget that APA recommends author-date in-text citations!
Need more help with APA Style? Check out the following resources: