1. Ecotourism and Certification: Setting Standards in Practice;Honey,2002
2. Cornerstones for Conservation: World Bank Assistance for Protected Areas,2003
3. Ecotourism and its role in sustainable development;Whelan,1991
4. Boo, E. (1992) The ecotourism boom: planning for development and management. WHN Technical Paper Series Paper 2, World Wildlife Fund.
5. Lindberg, K. and Enriquez, J. (1994) An Analysis of Ecotourism's Economic Contribution to Conservation in Belize. Vol. 2, Comprehensive Report, World Wildlife Fund and Ministry of Tourism and the Environment (Belize).