Dyfyniad APA

Ephross, P. H., & Vassil, T. V. (2005). Groups that work: Structure and process (2nd ed.). New York: Columbia University Press.

Dyfyniad Arddull Chicago

Ephross, Paul H., và Thomas V. Vassil. Groups That Work: Structure and Process. 2nd ed. New York: Columbia University Press, 2005.

Dyfyniad MLA

Ephross, Paul H., và Thomas V. Vassil. Groups That Work: Structure and Process. 2nd ed. New York: Columbia University Press, 2005.

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