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
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
3.		Youth travel matters - understanding the global phenomenon of youth travel / World Tourism Organization Data Publicação: 2008 Col.autor: OMT