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Dyfyniad Arddull ChicagoBesterfield, Dale H., and ...[et al.]. Total Quality Management. 3rd ed. New Delhi: Dorling Kindersley, 2007.
Dyfyniad MLABesterfield, Dale H., and ...[et al.]. Total Quality Management. 3rd ed. Dorling Kindersley, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.