Cita APA (7th ed.)

Napier, R., & Gershenfeld, M. K. (1993). Groups, theory and experience (5th ed.). Houghton Mifflin Company.

Cita Chicago (17th ed.)

Napier, Rodney, i Matti K. Gershenfeld. Groups, Theory and Experience. 5th ed. Boston: Houghton Mifflin Company, 1993.

Cita MLA (9th ed.)

Napier, Rodney, i Matti K. Gershenfeld. Groups, Theory and Experience. 5th ed. Houghton Mifflin Company, 1993.