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Dyfyniad Arddull ChicagoStevenson, Willliam J. Operations Management. Boston, MA: McGraw-Hill, 2005.
Dyfyniad MLAStevenson, Willliam J. Operations Management. Boston, MA: McGraw-Hill, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.