Dyfyniad APA

Gray,Mel. (2012). Social work theories and methods (2nd ed.). SAGE Publications.

Dyfyniad Arddull Chicago

Gray,Mel. Social Work Theories and Methods. 2nd ed. Thousand Oaks, CA: SAGE Publications, 2012.

Dyfyniad MLA

Gray,Mel. Social Work Theories and Methods. 2nd ed. SAGE Publications, 2012.

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