1.		The Sapnish Outbound Travel Market to Africa and the Middle East / World Tourism Organization Col.autor: OMT COTA(S): 12666
2.		Policy and practice for global tourism / OMT Data Publicação: 2011 Col.autor: OMT COTA(S): 12682; 12682-Dg
3.		Tourism Towards 2030 - Global Overview / World Tourism Organization Col.autor: OMT COTA(S): 12875; 12875.a; 12875-Dg