(2010). Tourism and biodiversity: Achieving common goals towards sustainability (1. pr.). World Tourism Organization.
Chicago-Zitierstil (17. Ausg.)Tourism and Biodiversity: Achieving Common Goals Towards Sustainability. 1. pr. Madrid, Spain: World Tourism Organization, 2010.
MLA-Zitierstil (9. Ausg.)Tourism and Biodiversity: Achieving Common Goals Towards Sustainability. 1. pr. World Tourism Organization, 2010.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.