APA-referens

Sharpley, R. A. (2011). The study of tourism: Past trends and future directions.

Chicago-stil citat

Sharpley, Richard; Author. The Study of Tourism: Past Trends and Future Directions. New York, Routledge, 2011.

MLA-referens

Sharpley, Richard; Author. The Study of Tourism: Past Trends and Future Directions. 2011.