Drucker, P. F. (2001). The essential Drucker: The best of sixty years of Peter Drucker's essential writings on management. New York: Collins Business Essentials.
Trích dẫn kiểu ChicagoDrucker, Peter F. The Essential Drucker: The Best of Sixty Years of Peter Drucker's Essential Writings On Management. New York: Collins Business Essentials, 2001.
Deismireacht MLADrucker, Peter F. The Essential Drucker: The Best of Sixty Years of Peter Drucker's Essential Writings On Management. New York: Collins Business Essentials, 2001.
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