1. AGUADEFOR. 1992. Information pamphlet. Association Guanacasteca de Desarrollo Forestal Aguadefor. Nicoya, Guanacaste, Costa Rica.
2. Altieri, M. A. 1987. Agroecology: The scientific basis of alternative agriculture. Westview Press. Boulder, Colorado, 227 pp.
3. Altieri, M. A., and M. K. Anderson. 1986. An ecological basis for the development of alternative agricultural systems for small farmers in the Third World.American Journal of Alternative Agriculture 1(1):30–38.
4. Barrett, S., and J. Kidd. 1991. Pathways: Towards an ecosystem approach. Report of phases I and II of an environmental audit of Toronto's East Bayfront and Port industrial area. Royal Commission on the Future of the Toronto Waterfront, Toronto, 168 pp.
5. Bastedo, J. D., J. G. Nelson, and P. B. Theberge. 1984. Ecological approach to resource survey and planning for environmentally sensitive areas: The ABC method.Environmental Management 8(2):125–134.