ASA Style - From the American Sociological Society. Often preferred in the fields of Sociology.
Format:
Author Last, First. Year of Pub. Title. City, State Abb./Country of Publisher: Publisher. Retrieved Month Day, Year (URL).
E-book Example:
Baracchi, Claudia. 2002. Of Myth, Life, And War In Plato's Republic. Indiana University Press. Retrieved February 15, 2013 (http://www.ENGCOhost.com).