Gaya APA

Napier, R, W., Gershenfeld, M, K. (1973). Groups: Theory and Experience . Boston: Houghton Mifflin Company.

Gaya MLA

Napier, Rodney, W.., Gershenfeld, Matti, K.. "Groups: Theory and Experience". Boston: Houghton Mifflin Company, 1973. Art Original.