APA (7th ed.) Citation

Drucker, P. F. (2006). Classic drucker. A Harvard Business Review Book.

Chicago Style (17th ed.) Citation

Drucker, Peter F. Classic Drucker. United States: A Harvard Business Review Book, 2006.

MLA (9th ed.) Citation

Drucker, Peter F. Classic Drucker. A Harvard Business Review Book, 2006.

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