APA (7th ed.) Citation

Drucker. (2002). The effective executive. HarperBusiness Essentials.

Chicago Style (17th ed.) Citation

Drucker. The Effective Executive. New York: HarperBusiness Essentials, 2002.

MLA (8th ed.) Citation

Drucker. The Effective Executive. HarperBusiness Essentials, 2002.

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