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Dyfyniad Arddull ChicagoKeegan, Warren J. Global Marketing Management. 5th ed. New Delhi: Prentice hall of India, 1995.
Dyfyniad MLAKeegan, Warren J. Global Marketing Management. 5th ed. Prentice hall of India, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.