APA (7th ed.) Citation

World Tourism Organization. (1988). Quality control of tourism products and services. World Tourism Organization.

Chicago Style (17th ed.) Citation

World Tourism Organization. Quality Control of Tourism Products and Services. Madrid: World Tourism Organization, 1988.

MLA (9th ed.) Citation

World Tourism Organization. Quality Control of Tourism Products and Services. World Tourism Organization, 1988.

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