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Dyfyniad Arddull ChicagoRamaswamy , M. Marketing Salesmanship and Advertising. New Delhi: Sterling, 1991.
Dyfyniad MLARamaswamy , M. Marketing Salesmanship and Advertising. Sterling, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.