Dyfyniad APA
Drucker, P. F., & Wartzman, R. (2010). The Drucker lectures: Essential lessons on management, society, and economy. McGraw-Hill.
Dyfyniad Arddull Chicago
Drucker, Peter F., and Rick Wartzman. The Drucker Lectures: Essential Lessons on Management, Society, and Economy. New York: McGraw-Hill, 2010.
Dyfyniad MLA
Drucker, Peter F., and Rick Wartzman. The Drucker Lectures: Essential Lessons on Management, Society, and Economy. McGraw-Hill, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.