Leonard, E. C. (2010). Supervision: Concepts and practices of management (11th ed.). South-Western, Cengage.
Chicago-Zitierstil (17. Ausg.)Leonard, Edwin C. Supervision: Concepts and Practices of Management. 11th ed. Mason, OH: South-Western, Cengage, 2010.
MLA-Zitierstil (9. Ausg.)Leonard, Edwin C. Supervision: Concepts and Practices of Management. 11th ed. South-Western, Cengage, 2010.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.