Dyfyniad APA

Phillips, H. U. (1957). Essentials of social group work skill. Association Press.

Dyfyniad Arddull Chicago

Phillips, Helen Upson. Essentials of Social Group Work Skill. New York: Association Press, 1957.

Dyfyniad MLA

Phillips, Helen Upson. Essentials of Social Group Work Skill. Association Press, 1957.

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