Cita APA (7a ed.)

World Tourism Organization. (1999). Changes in leisure time: The impact on tourism. World Tourism Organization.

Cita Chicago Style (17a ed.)

World Tourism Organization. Changes in Leisure Time: The Impact on Tourism. Madrid: World Tourism Organization, 1999.

Cita MLA (8a ed.)

World Tourism Organization. Changes in Leisure Time: The Impact on Tourism. World Tourism Organization, 1999.