World Tourism Organization. (2004). European Integration in the Era of the European Union's Enlargement and the Development of Tourism, Malta 22-23 May 2003 =: L'integration europeenne a l'ere de l'elargissement de l'Union europeenne et le developpement du tourisme. Madrid: WTO.
Παραπομπή Chicago StyleWorld Tourism Organization. European Integration in the Era of the European Union's Enlargement and the Development of Tourism, Malta 22-23 May 2003 =: L'integration Europeenne a L'ere De L'elargissement De L'Union Europeenne Et Le Developpement Du Tourisme. Madrid: WTO, 2004.
Παραπομπή MLAWorld Tourism Organization. European Integration in the Era of the European Union's Enlargement and the Development of Tourism, Malta 22-23 May 2003 =: L'integration Europeenne a L'ere De L'elargissement De L'Union Europeenne Et Le Developpement Du Tourisme. Madrid: WTO, 2004.