APA (7th ed.) Citation

DRUCKER. (1993). The effective executive. HarperBusiness.

Chicago Style (17th ed.) Citation

DRUCKER. The Effective Executive. New York, USA: HarperBusiness, 1993.

MLA (9th ed.) Citation

DRUCKER. The Effective Executive. HarperBusiness, 1993.

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