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Dyfyniad Arddull ChicagoLutz, Richard J. Journal of Consumer Reaserch. Newq York: Robinson association, 1989.
Dyfyniad MLALutz, Richard J. Journal of Consumer Reaserch. Robinson association, 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.