World Tourism Organization Market Intelligence and Promotion Section & World Tourism Organization Sustainable Development of Tourism Section. (2002). The Canadian ecotourism market. World Tourism Organization.
Παραπομπή σε μορφή Chicago (17η εκδ.)World Tourism Organization Market Intelligence and Promotion Section και World Tourism Organization Sustainable Development of Tourism Section. The Canadian Ecotourism Market. Madrid: World Tourism Organization, 2002.
Παραπομπή σε μορφή MLA (9th εκδ.)World Tourism Organization Market Intelligence and Promotion Section και World Tourism Organization Sustainable Development of Tourism Section. The Canadian Ecotourism Market. World Tourism Organization, 2002.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.