APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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