APA (7th ed.) Citation

Drucker, P. F. The essential DRUCKER. Harperbusiness.

Chicago Style (17th ed.) Citation

Drucker, Peter F. The Essential DRUCKER. Harperbusiness.

MLA (8th ed.) Citation

Drucker, Peter F. The Essential DRUCKER. Harperbusiness.

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