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.
استشهاد بنمط شيكاغوDrucker, Peter F. The Essential Drucker: The Best of Sixty Years of Peter Drucker's Essential Writings On Management. New York: Collins Business Essentials, 2001.
MLA استشهادDrucker, Peter F. The Essential Drucker: The Best of Sixty Years of Peter Drucker's Essential Writings On Management. New York: Collins Business Essentials, 2001.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.