APA Citation

Drucker, P. F. (1999). Management Challenges for the 21st Century. Perfectbound.

Chicago Style Citation

Drucker, Peter F. Management Challenges for the 21st Century. Perfectbound, 1999.

MLA Citation

Drucker, Peter F. Management Challenges for the 21st Century. Perfectbound, 1999.

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