APA (7th ed.) Citation

Heap, K. (1977). Group theory for social workers: An introd. Pergamon Pr.

Chicago Style (17th ed.) Citation

Heap, Ken. Group Theory for Social Workers: An Introd. Oxford: Pergamon Pr, 1977.

MLA (9th ed.) Citation

Heap, Ken. Group Theory for Social Workers: An Introd. Pergamon Pr, 1977.

Warning: These citations may not always be 100% accurate.