Cita APA

Rodney W.Napier & Matti K .Gershenfeld. (1999). Groups: Theory and experience (Ed.6.). Houghton mifflin company.

Chicago Edition Citation

Rodney W.Napier i Matti K .Gershenfeld. Groups: Theory and Experience. Ed.6. New york: Houghton mifflin company, 1999.

Cita MLA

Rodney W.Napier i Matti K .Gershenfeld. Groups: Theory and Experience. Ed.6. Houghton mifflin company, 1999.