The SAGE handbook of social work.

MLA

Gray, Mel, James Midgley, and Stephen A Webb. The Sage Handbook of Social Work. London: Sage Publications, 2012.

APA

Gray, M., Midgley, J., & Webb, S. A. (2012). The SAGE handbook of social work. London: Sage Publications.

Chicago

Gray, Mel, ed., James Midgley ed., and Stephen A. Webb ed. The SAGE Handbook of Social Work. London: Sage Publications, 2012.