Παραπομπή σε μορφή APA (7η εκδ.)

World Tourism Organization. (1999). Tourism 2020 vision: Intraregional and long haul flows. World Tourism Organization.

Παραπομπή σε μορφή Chicago (17η εκδ.)

World Tourism Organization. Tourism 2020 Vision: Intraregional and Long Haul Flows. Madrid, Spain: World Tourism Organization, 1999.

Παραπομπή σε μορφή MLA (9th εκδ.)

World Tourism Organization. Tourism 2020 Vision: Intraregional and Long Haul Flows. World Tourism Organization, 1999.