Ryan, C. (2006). Recreational tourism: Demand and impacts. Viva books.
Chicago Edition CitationRyan, Chris. Recreational Tourism: Demand and Impacts. New Delhi: Viva books, 2006.
Cita MLARyan, Chris. Recreational Tourism: Demand and Impacts. Viva books, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.