APA (7th ed.) Citation

Drucker. (2003). The essential drucker: The best of sixty years of Peter Drucker's essential writings on management. HarperCollins.

Chicago Style (17th ed.) Citation

Drucker. The Essential Drucker: The Best of Sixty Years of Peter Drucker's Essential Writings on Management. New York: HarperCollins, 2003.

MLA (8th ed.) Citation

Drucker. The Essential Drucker: The Best of Sixty Years of Peter Drucker's Essential Writings on Management. HarperCollins, 2003.

Warning: These citations may not always be 100% accurate.