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Dyfyniad Arddull ChicagoSummers, Donna. Quality Management: Creating and Sustaining Organisational Effectiveness. New Delhi: Prentice-Hall of India, 2005.
Dyfyniad MLASummers, Donna. Quality Management: Creating and Sustaining Organisational Effectiveness. Prentice-Hall of India, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.