World Tourism Organization Market Intelligence and Promotion Section & World Tourism Organization. (2002). Youth outbound travel of the Germans, the British & the French. World Tourism Organization, Market Intelligence and Promotion Section.
Παραπομπή σε μορφή Chicago (17η εκδ.)World Tourism Organization Market Intelligence and Promotion Section και World Tourism Organization. Youth Outbound Travel of the Germans, the British & the French. Madrid: World Tourism Organization, Market Intelligence and Promotion Section, 2002.
Παραπομπή σε μορφή MLA (9th εκδ.)World Tourism Organization Market Intelligence and Promotion Section και World Tourism Organization. Youth Outbound Travel of the Germans, the British & the French. World Tourism Organization, Market Intelligence and Promotion Section, 2002.