Cateora, P. R., & Graham, J. L. (2005). International marketing (12th ed.). Boston: McGraw-Hill/Irwin.
Dyfyniad Arddull ChicagoCateora, Philip R., và John L. Graham. International Marketing. 12th ed. Boston: McGraw-Hill/Irwin, 2005.
Dyfyniad MLACateora, Philip R., và John L. Graham. International Marketing. 12th ed. Boston: McGraw-Hill/Irwin, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.