Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.