1. Marketing Tourism Places,1990
2. Ecologically Sustainable Development Working Group on Tourism;Australia,1991
3. Tourism: Australia's Passport to Growth. National Tourism Strategy;Australia,1992
4. Tourism. A National Strategy for Ecologically Sustainable Development;Australia,1993
5. Ecotourism in Costa Rica: The Tough Road for Remaining Number One;Baez;Adventure Travel Society Newsletter,1992