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Dyfyniad Arddull ChicagoRai,Alok Kumar. Customer Relationship Management: Concepts and Cases. New Delhi: PHI, 2008.
Dyfyniad MLARai,Alok Kumar. Customer Relationship Management: Concepts and Cases. PHI, 2008.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.