APA (7th ed.) Citation

Heap, K. (1977). Group theory for social workers: An introduction (1. Engl. ed.). Pergamon Press.

Chicago Style (17th ed.) Citation

Heap, Ken. Group Theory for Social Workers: An Introduction. 1. Engl. ed. Oxford [u.a.]: Pergamon Press, 1977.

MLA (9th ed.) Citation

Heap, Ken. Group Theory for Social Workers: An Introduction. 1. Engl. ed. Pergamon Press, 1977.