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Dyfyniad Arddull ChicagoHess, Peter, and Julie Siciliano. Management: Responsibility for Performance. New York: McGraw-Hill, 1996.
Dyfyniad MLAHess, Peter, and Julie Siciliano. Management: Responsibility for Performance. McGraw-Hill, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.