APA aipamena

Hilgert, R. L., & Leonard, E. C. (2001). Supervision: Concepts and practice of management (8th ed.). South-Western College Publishing.

Chicago Style aipamena

Hilgert, Raymond L., and Edwin C. Leonard. Supervision: Concepts and Practice of Management. 8th ed. Cincinnati, Ohio: South-Western College Publishing, 2001.

MLA aipamena

Hilgert, Raymond L., and Edwin C. Leonard. Supervision: Concepts and Practice of Management. 8th ed. South-Western College Publishing, 2001.