Dyfyniad APA
Koontz, H., & Weihrich, H. (1988). Management (9th ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
Koontz, Harold, and Heinz Weihrich. Management. 9th ed. Singapore: McGraw-Hill, 1988.
Dyfyniad MLA
Koontz, Harold, and Heinz Weihrich. Management. 9th ed. McGraw-Hill, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.