APA (7th ed.) Citation

Drucker, P. F. (2001). The Essential Drucker. Butterworth- Heinemann.

Chicago Style (17th ed.) Citation

Drucker, Peter F. The Essential Drucker. New Delhi: Butterworth- Heinemann, 2001.

MLA (9th ed.) Citation

Drucker, Peter F. The Essential Drucker. Butterworth- Heinemann, 2001.