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Dyfyniad Arddull ChicagoMorrison, Alastair M. Hospitality & Travel Marketing. 4th ed. Australia: Delmar, 2010.
Dyfyniad MLAMorrison, Alastair M. Hospitality & Travel Marketing. 4th ed. Delmar, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.