APA ציטוט

Drucker, P. F. (2001). Management Challenges for the 21st Century. HarperCollins Publishers.

Chicago Style (17th ed.) Citation

Drucker, Peter F. Management Challenges for the 21st Century. New York: HarperCollins Publishers, 2001.

ציטוט MLA

Drucker, Peter F. Management Challenges for the 21st Century. HarperCollins Publishers, 2001.