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Dyfyniad Arddull ChicagoHoyer, Wayne D., and Deborah J. Maclnnis. Consumer Behavior. 4th ed. Boston: Houghton Mifflin, 2007.
Dyfyniad MLAHoyer, Wayne D., and Deborah J. Maclnnis. Consumer Behavior. 4th ed. Houghton Mifflin, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.