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Dyfyniad Arddull ChicagoWilliams, Stephen. Tourism Geography: A New Synthesis. 2nd Edn. New York, USA: Routledge, 2009.
Dyfyniad MLAWilliams, Stephen. Tourism Geography: A New Synthesis. 2nd Edn. Routledge, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.