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Dyfyniad Arddull ChicagoJoseph F Hair and Robert P Bush. Marketing Research: Within a Changing Information Environment. 3rd. McGraw Hill, 2006.
Dyfyniad MLAJoseph F Hair and Robert P Bush. Marketing Research: Within a Changing Information Environment. 3rd. McGraw Hill, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.