APA引文

Ryan, C. (2006). Recreational tourism: Demand and impacts. Viva books.

Chicago Edition Citation

Ryan, Chris. Recreational Tourism: Demand and Impacts. New Delhi: Viva books, 2006.

MLA引文

Ryan, Chris. Recreational Tourism: Demand and Impacts. Viva books, 2006.

警告：這些引文格式不一定是100％准確.