Παραπομπή σε μορφή APA (7η εκδ.)

The world ecotourism summit, World Tourism Organization, & United Nations Environment Programme. (2002). The World Ecotourism Summit: Final report, Qubec City, Canada, 19 to 22 May 2002. World Tourism Organization.

Παραπομπή σε μορφή Chicago (17η εκδ.)

The world ecotourism summit, World Tourism Organization, και United Nations Environment Programme. The World Ecotourism Summit: Final Report, Qubec City, Canada, 19 to 22 May 2002. Madrid: World Tourism Organization, 2002.

Παραπομπή σε μορφή MLA (9th εκδ.)

The world ecotourism summit, et al. The World Ecotourism Summit: Final Report, Qubec City, Canada, 19 to 22 May 2002. World Tourism Organization, 2002.