Παραπομπή APA

World Tourism Organization. (2004). Indicators of sustainable development for tourism destinations: A guidebook. Madrid, Spain: World Tourism Organization.

Παραπομπή Chicago Style

World Tourism Organization. Indicators of Sustainable Development for Tourism Destinations: A Guidebook. Madrid, Spain: World Tourism Organization, 2004.

Παραπομπή MLA

World Tourism Organization. Indicators of Sustainable Development for Tourism Destinations: A Guidebook. Madrid, Spain: World Tourism Organization, 2004.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.