APA (7th ed.) Zitazioa
Ryan, C. (2003). Recreational tourism: Demand and impacts. Channel View Publications.
Chicago Style (17th ed.) Zitazioa
Ryan, Chris. Recreational Tourism: Demand and Impacts. Clevedon, England ; Buffalo [N.Y.]: Channel View Publications, 2003.
MLA (9th ed.) Zitazioa
Ryan, Chris. Recreational Tourism: Demand and Impacts. Channel View Publications, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.