Παραπομπή APA

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

Παραπομπή Chicago Style

Sharpley, Richard. Study of Tourism: Past Trends & Future Directions. Oxon: Routledge, 2011.

Παραπομπή MLA

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