Trecker, H. B. 1. (1948). Social group work: Principles and practices (Revised and Enlarged.). New York, New York: Whiteside.
Citación estilo ChicagoTrecker, Harleigh Bradley 1911-. Social Group Work: Principles and Practices. Revised and Enlarged. New York, New York: Whiteside, 1948.
Cita MLATrecker, Harleigh Bradley 1911-. Social Group Work: Principles and Practices. Revised and Enlarged. New York, New York: Whiteside, 1948.
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