APA (7th ed.) Citation

World Tourism Organization. (1981). International tourism in figures 1970-1980. World Tourism Organization.

Chicago Style (17th ed.) Citation

World Tourism Organization. International Tourism in Figures 1970-1980. Madrid: World Tourism Organization, 1981.

MLA (9th ed.) Citation

World Tourism Organization. International Tourism in Figures 1970-1980. World Tourism Organization, 1981.

Warning: These citations may not always be 100% accurate.