Cita APA (7th ed.)

Leonard, E. C., & Hilgert, R. L. (2007). Supervision: Concepts and practices of management (10th ed.). Thomson/South-Western.

Cita Chicago (17th ed.)

Leonard, Edwin C., i Raymond L. Hilgert. Supervision: Concepts and Practices of Management. 10th ed. Mason, OH: Thomson/South-Western, 2007.

Cita MLA (9th ed.)

Leonard, Edwin C., i Raymond L. Hilgert. Supervision: Concepts and Practices of Management. 10th ed. Thomson/South-Western, 2007.