Beatty, J., & Drucker, P. F. (1998). The world according to Peter Drucker. Universities Press.
Citazione stile Chigago Style (17a edizione)Beatty, Jack, e Peter F. Drucker. The World According to Peter Drucker. New York ; india: Universities Press, 1998.
Citatione MLA (8a ed.)Beatty, Jack, e Peter F. Drucker. The World According to Peter Drucker. Universities Press, 1998.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.