Webb, S. A., & Gray, M. (2013). Social work: Theories and methods (2nd ed.). SAGE.
Cita Chicago (17th ed.)Webb, Stephen A., i Mel Gray. Social Work: Theories and Methods. 2nd ed. Los Angeles, London: SAGE, 2013.
Cita MLA (9th ed.)Webb, Stephen A., i Mel Gray. Social Work: Theories and Methods. 2nd ed. SAGE, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.