APA-viite (7. p.)

Drucker, P. (2006). Management challenges for the 21st Century. Palgrave Macmillan Punl.

Chicago-viite (17. p.)

Drucker, Peter. Management Challenges for the 21st Century. New York: Palgrave Macmillan Punl, 2006.

MLA-viite (9. p.)

Drucker, Peter. Management Challenges for the 21st Century. Palgrave Macmillan Punl, 2006.