25.		Environmental codes of conduct for tourism / United Nations Environment Programme Industry and Environment Data Publicação: 1995 Col.autor: United Nations Environment Programme Industry and Environment
26.		Codigo de conduta profesional de las agencias de viajes socios de A.E.D.A.V.E. / Asociacíon Empresarial de Agencias de Viajes Españolas Data Publicação: 1980 Col.autor: Asociación Empresarial de Agencias de Viajes Españolas
27.		Réguler les loisirs motorisés dans le parc du Morvan / Alain Millot Autor: Millot, Alain
28.		Código ético de empresa / Instituto do Emprego e Formação Profissional Col.autor: Portugal. Instituto do Emprego e Formação Profissional
29.		Projecto de um código de boas práticas de higiene para a restauração / UNIHSNOR Data Publicação: [1999?] Col.autor: UNIHSNOR-União das Associações da Hotelaria e Restauração do Norte de Portugal
30.		Can sanctions and rewards explain conformance behaviour of tour operators with ecotourism guidelines ? / Ercan Sirakaya and Muzaffer Uysal Autor: Sirakaya, Ercan Coautor: ; Uysal, Muzaffer
31.		Turismo para todos-turismo de calidad / Henryk F. Handszuh Autor: Handszuh, Henryk F.
32.		An examination of wildlife tourism as a sustainable form of tourism development in North West Scotland / L. Rory MacLellan Autor: MacLellan, L. Rory
33.		Tourism and the environment: facts and figures / United Nations Environment Programme Industry and Environment Programme Activity Centre - UNEP IE|PAC Col.autor: United Nations Environment Programme Industry and Environment Programme Activity Centre - UNEP IE|PAC