APA Edition Citation

Drucker, P. F. (1999). Management challenges for the 21st century.

Chicago Edition Citation

Drucker, Peter F. Management Challenges for the 21st Century. Butterworth-Heinemann:Oxford, 1999.

MLA Edition Citation

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

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