Παραπομπή APA

Travis, A. . S. A. (2011). Planning for tourism, leisure and sustainability: International case studies.

Παραπομπή Chicago Style

Travis, Anthony S; Author. Planning for Tourism, Leisure and Sustainability: International Case Studies. New York, CABI Publishing, 2011.

Παραπομπή MLA

Travis, Anthony S; Author. Planning for Tourism, Leisure and Sustainability: International Case Studies. 2011.