World Tourism Organization Market Intelligence and Promotion Section & World Tourism Organization. (2001). Outbound tourism of Spain: Market profile. World Tourism Organization.
Παραπομπή σε μορφή Chicago (17η εκδ.)World Tourism Organization Market Intelligence and Promotion Section και World Tourism Organization. Outbound Tourism of Spain: Market Profile. Madrid: World Tourism Organization, 2001.
Παραπομπή σε μορφή MLA (9th εκδ.)World Tourism Organization Market Intelligence and Promotion Section και World Tourism Organization. Outbound Tourism of Spain: Market Profile. World Tourism Organization, 2001.
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