Beatty, J., & Drucker, P. F. (1998). The world according to Peter Drucker. Universities Press.
Chicago Style (17. basım) AtıfBeatty, Jack, ve Peter F. Drucker. The World According to Peter Drucker. New York ; india: Universities Press, 1998.
MLA (8th ed.) AtıfBeatty, Jack, ve Peter F. Drucker. The World According to Peter Drucker. Universities Press, 1998.
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