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Dyfyniad Arddull ChicagoCateora, Philip R. International Marketing. Boston, Mass: McGraw-Hill/Irwin, 2007.
Dyfyniad MLACateora, Philip R. International Marketing. Boston, Mass: McGraw-Hill/Irwin, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.