CHURCHILL, G. A. (2004). Basic marketing research. South-Western.
Dyfyniad Arddull ChicagoCHURCHILL, Gilbert A. Basic Marketing Research. South-Western, 2004.
Dyfyniad MLACHURCHILL, Gilbert A. Basic Marketing Research. South-Western, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.