Frangialli, F. (1999). Considerations sur le tourisme international: Discours et documents, 1997-1999 = Observations on international tourism : addresses and documents, 1997-1999 = Consideraciones sobre el turismo internacional : discursos y documentos, 1997-1999. World Tourism Organization.
Παραπομπή σε μορφή Chicago (17η εκδ.)Frangialli, Francesco. Considerations Sur Le Tourisme International: Discours Et Documents, 1997-1999 = Observations on International Tourism : Addresses and Documents, 1997-1999 = Consideraciones Sobre El Turismo Internacional : Discursos Y Documentos, 1997-1999. Madrid, Spain: World Tourism Organization, 1999.
Παραπομπή σε μορφή MLA (9th εκδ.)Frangialli, Francesco. Considerations Sur Le Tourisme International: Discours Et Documents, 1997-1999 = Observations on International Tourism : Addresses and Documents, 1997-1999 = Consideraciones Sobre El Turismo Internacional : Discursos Y Documentos, 1997-1999. World Tourism Organization, 1999.