APA Citatie

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

Chicago Style citaat

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

MLA citatie

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