Cohen, W. A. (2014). The practical Drucker: Applying the wisdom of the world's greatest management thinker. AMACOM.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCohen, William A. The Practical Drucker: Applying the Wisdom of the World's Greatest Management Thinker. New York: AMACOM, 2014.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCohen, William A. The Practical Drucker: Applying the Wisdom of the World's Greatest Management Thinker. AMACOM, 2014.
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