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Dyfyniad Arddull ChicagoWeihrich, Heinz, and Harold Koontz. Management: A Global Perspective. 10th ed. New York: McGraw-Hill, 1993.
Dyfyniad MLAWeihrich, Heinz, and Harold Koontz. Management: A Global Perspective. 10th ed. McGraw-Hill, 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.