| 1. | Tourism 2000 : building a sustainable future for Asia-Pacific / org. World Tourism OrganizationData Publicação: 1997 Col.autor: Asia Pacific ministers conference on tourism and environment. 1997 Co col. autor sec.: OMT |  | |
| 2. | Tourisme et environnement: vers une nouvelle culture touristique : actes / Conselho da EuropaData Publicação: 1997 Col.autor: Séminaire Tourisme et environnement | | |
| 3. | Património natural e cultural : base essencial do turismo [policopiado] / Maria José de VallêraAutor: Vallêra, Maria José de Data Publicação: 1997 | | |
| 4. | Attitudinal compliance with ecotourism guidelines / Ercan SirakayaAutor: Sirakaya, Ercan |  | |