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Dyfyniad Arddull ChicagoSingh, Tatandeep. Handbook of Environmental Guidelines for Indian Tourism. New Delhi: Kanishka, 2004.
Dyfyniad MLASingh, Tatandeep. Handbook of Environmental Guidelines for Indian Tourism. Kanishka, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.