Παραπομπή APA

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

Παραπομπή Chicago Style

Sharpley, Richard. The Study of Tourism: Past Trends and Future Directions. London: Routledge, 2011.

Παραπομπή MLA

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