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Dyfyniad Arddull ChicagoHansen, Bertrand L., and Prabhakar M. Ghare. Quality Control and Applications. New Delhi: Prentice Hall, 1997.
Dyfyniad MLAHansen, Bertrand L., and Prabhakar M. Ghare. Quality Control and Applications. Prentice Hall, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.