Napier, R. W., & Gershenfeld, M. K. (1989). Groups: Theory and experience (4th ed.). Houghton Mifflin.
Chicago Style (17. basım) AtıfNapier, Rodney W., ve Matti K. Gershenfeld. Groups: Theory and Experience. 4th ed. Boston: Houghton Mifflin, 1989.
MLA (9th ed.) AtıfNapier, Rodney W., ve Matti K. Gershenfeld. Groups: Theory and Experience. 4th ed. Houghton Mifflin, 1989.
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