APA (7th ed.) Citation

World Tourism Organization & European Travel Commission. (2011). Handbook on tourism product development. World Tourism Organization, European Travel Commission.

Chicago Style (17th ed.) Citation

World Tourism Organization and European Travel Commission. Handbook on Tourism Product Development. Madrid: World Tourism Organization, European Travel Commission, 2011.

MLA (9th ed.) Citation

World Tourism Organization and European Travel Commission. Handbook on Tourism Product Development. World Tourism Organization, European Travel Commission, 2011.