Dyfyniad APA

Drucker, P. F. (2008). The Essential Drucker: The Best of Sixty Years of Peter Drucker's Essential Writings on Management. Harper Business.

Dyfyniad Arddull Chicago

Drucker, Peter F. The Essential Drucker: The Best of Sixty Years of Peter Drucker's Essential Writings on Management. New York: Harper Business, 2008.

Dyfyniad MLA

Drucker, Peter F. The Essential Drucker: The Best of Sixty Years of Peter Drucker's Essential Writings on Management. Harper Business, 2008.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.