Παραπομπή σε μορφή APA (7η εκδ.)

World Tourism Organization. (2004). Tourism congestion management at natural and cultural sites. World Tourism Organization.

Παραπομπή σε μορφή Chicago (17η εκδ.)

World Tourism Organization. Tourism Congestion Management at Natural and Cultural Sites. Madrid, Spain: World Tourism Organization, 2004.

Παραπομπή σε μορφή MLA (9th εκδ.)

World Tourism Organization. Tourism Congestion Management at Natural and Cultural Sites. World Tourism Organization, 2004.