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Dyfyniad Arddull ChicagoRyan, Chris, Stephen J. Page, and Michelle Aicken. Taking Tourism to the Limits: Issues, Concepts and Managerial Perspectives. Amsterdam: Elsevier, 2005.
Dyfyniad MLARyan, Chris, et al. Taking Tourism to the Limits: Issues, Concepts and Managerial Perspectives. Elsevier, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.