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Dyfyniad Arddull ChicagoChandra, Prabhas. Global Ecotourism: Codes Protocols and Charters. New Delhi: Kanishka Publishers, 2003.
Dyfyniad MLAChandra, Prabhas. Global Ecotourism: Codes Protocols and Charters. Kanishka Publishers, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.