1.		The chinese outbound travel market with special insight into the image of Europe as a destination / World Tourism Organization Data Publicação: 2008 Col.autor: OMT COTA(S): 12137; 12137-a; 12137-Dg
2.		Climate change and tourism - responding to global challenges / World Tourism Organization, United Nations Environment Programme Col.autor: OMT Co col. autor: United Nations Environment Programme COTA(S): 12136; 12136-Dg
3.		Youth travel matters - understanding the global phenomenon of youth travel / World Tourism Organization Data Publicação: 2008 Col.autor: OMT COTA(S): 12465