The basic APA source citation for a book includes these elements (as many as are available):
Author, A. A. (Year of publication). Title of work: Capital letter also for subtitle. Location: Publisher.
Sample: Osborne, L. B. (2012). Miles to go for freedom: Segregation & civil rights in the Jim Crow years. New York, NY: Abrams Books.
"APA" stands for American Psychological Association, and it is one of several accepted standard formats for giving credit to the sources you use for academic projects. If you want to look up more rules for citing information in APA format, check out the excellent guide at Purdue University's Online Writing Lab (OWL).
APA citations are provided for articles you access through databases (such as EBSCO or Gale in Context.) Click the "Cite" tool located at the top of the page or on the right-hand side of the article summary page in the database, and be sure to select APA style citation!