The basic MLA source citation for a book includes these elements (as many as are available):
Author Last, First. Title of Book. City of Publication: Publishing Company, Year.
Sample: Osborne, Linda Barrett. Miles to Go for Freedom: Segregation & Civil Rights in the Jim Crow Years. New York: Abrams Books, 2012.
"MLA" stands for Modern Language 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 MLA format, check out the excellent guide at Purdue University's Online Writing Lab (OWL).
MLA citations are provided for articles you access through databases (such as EBSCO or US History 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: