World Tourism Organization Market Intelligence and Promotion Section. (2006). The impact of rising oil prices on international tourism. World Tourism Organization.
Παραπομπή σε μορφή Chicago (17η εκδ.)World Tourism Organization Market Intelligence and Promotion Section. The Impact of Rising Oil Prices on International Tourism. World Tourism Organization, 2006.
Παραπομπή σε μορφή MLA (8th εκδ.)World Tourism Organization Market Intelligence and Promotion Section. The Impact of Rising Oil Prices on International Tourism. World Tourism Organization, 2006.
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