Beatty, J., & Drucker, P. F. (1998). The world according to Peter Drucker. Universities Press.
Chicagoスタイル(17版)引用形式Beatty, Jack, , Peter F. Drucker. The World According to Peter Drucker. New York ; india: Universities Press, 1998.
MLA(8版)引用形式Beatty, Jack, , Peter F. Drucker. The World According to Peter Drucker. Universities Press, 1998.
警告: この引用は必ずしも正確ではありません.