Northen, H., & Kurland, R. (2001). Social work with groups. New York: Columbia University Press.
Chicago Stili AlıntıNorthen, Helen, ve Roselle Kurland. Social Work With Groups. New York: Columbia University Press, 2001.
MLA AlıntıNorthen, Helen, ve Roselle Kurland. Social Work With Groups. New York: Columbia University Press, 2001.
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