World Tourism Organization Market Intelligence and Promotion Section & World Tourism Organization. (2001). Tourism after 11 September 2001: Analysis, remedial actions and prospects. World Tourism Organization.
Παραπομπή σε μορφή Chicago (17η εκδ.)World Tourism Organization Market Intelligence and Promotion Section και World Tourism Organization. Tourism After 11 September 2001: Analysis, Remedial Actions and Prospects. Madrid, Spain: World Tourism Organization, 2001.
Παραπομπή σε μορφή MLA (9th εκδ.)World Tourism Organization Market Intelligence and Promotion Section και World Tourism Organization. Tourism After 11 September 2001: Analysis, Remedial Actions and Prospects. World Tourism Organization, 2001.
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