Heap, K. (1985). The practice of social work with groups: A systematic approach. National Institute social services library.
Chicago-Zitierstil (17. Ausg.)Heap, Ken. "The Practice of Social Work with Groups: A Systematic Approach." National Institute Social Services Library 1985.
MLA-Zitierstil (8. Ausg.)Heap, Ken. "The Practice of Social Work with Groups: A Systematic Approach." National Institute Social Services Library, 1985.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.