Cohen, W. A. (2014). The practical Drucker: Applying the wisdom of the world's greatest management thinker. AMACOM.
Lua i Stíl Chicago (17ú heag.)Cohen, William A. The Practical Drucker: Applying the Wisdom of the World's Greatest Management Thinker. New York: AMACOM, 2014.
Lua MLA (9ú heag.)Cohen, William A. The Practical Drucker: Applying the Wisdom of the World's Greatest Management Thinker. AMACOM, 2014.
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