Cita APA (7th ed.)

Beatty, J., & Drucker, P. F. (1998). The world according to Peter Drucker. Universities Press.

Cita Chicago (17th ed.)

Beatty, Jack, i Peter F. Drucker. The World According to Peter Drucker. New York ; india: Universities Press, 1998.

Cita MLA (8th ed.)

Beatty, Jack, i Peter F. Drucker. The World According to Peter Drucker. Universities Press, 1998.