Sundel, S. S., & Sundel, M. (1993). Behavior modification in the human services: A systematic introduction to concepts and applications (3rd ed.). Sage Publications.
Chicago-Zitierstil (17. Ausg.)Sundel, Sandra Stone, und Martin Sundel. Behavior Modification in the Human Services: A Systematic Introduction to Concepts and Applications. 3rd ed. Newbury Park, CA: Sage Publications, 1993.
MLA-Zitierstil (9. Ausg.)Sundel, Sandra Stone, und Martin Sundel. Behavior Modification in the Human Services: A Systematic Introduction to Concepts and Applications. 3rd ed. Sage Publications, 1993.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.