Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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