1.		O turismo no Portugal de hoje / Instituto de Promoção Turística Data Publicação: 199? Col.autor: Portugal. Instituto de Promoção Turística
2.		An analysis of monetary voluntary contributions for cultural resources: the case of the British Museum / Alexandros Apostolakis, Shabbar Jaffry Autor: Apostolakis, Alexandros Coautor: ; Jaffry, Shabbar
3.		Global Report on Shopping Tourism / World Tourism Organization (UNWTO) Data Publicação: 2014 Col.autor: OMT
4.		Visitor spending effects: assessing and showcasing America's investment in national parks / Lynne Koontz [et al.] Resp- Sec.: Koontz, Lynne Thomas, Catherine Cullinane Ziesler, Pamela Olson, Jeffrey Meldrum, Bret
5.		The contribution of Tourism to the socio-economic recovery of areas in decline : Declaration of Cordoba / Juan Mendoza Autor: Mendoza, Juan Data Publicação: 2005 Col.autor: European Economic and Social Committee