APA (7th ed.) Citation

Drucker, P. F. (2006). Classic Drucker. Harvard Business School Press.

Chicago Style (17th ed.) Citation

Drucker, Peter Ferdinand. Classic Drucker. Boston, Massachusetts: Harvard Business School Press, 2006.

MLA (8th ed.) Citation

Drucker, Peter Ferdinand. Classic Drucker. Harvard Business School Press, 2006.

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