Frangialli, F. (2001). Considrations sur le tourisme international: Discours et documents, 1999-2000 = Observations on international tourism : addresses and documents, 1999-2000 = Consideraciones sobre el turismo internacional : discursos y documentos, 1999-2000. World Tourism Organization.
Παραπομπή σε μορφή Chicago (17η εκδ.)Frangialli, Francesco. Considrations Sur Le Tourisme International: Discours Et Documents, 1999-2000 = Observations on International Tourism : Addresses and Documents, 1999-2000 = Consideraciones Sobre El Turismo Internacional : Discursos Y Documentos, 1999-2000. Madrid, Spain: World Tourism Organization, 2001.
Παραπομπή σε μορφή MLA (9th εκδ.)Frangialli, Francesco. Considrations Sur Le Tourisme International: Discours Et Documents, 1999-2000 = Observations on International Tourism : Addresses and Documents, 1999-2000 = Consideraciones Sobre El Turismo Internacional : Discursos Y Documentos, 1999-2000. World Tourism Organization, 2001.