APA (7. basım) Alıntı

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

Chicago Style (17. basım) Atıf

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

MLA (9th ed.) Atıf

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