1. Summary for Policymakers,2014
2. Environmental Education in the 21st Century: Theory, Practice, Progress and Promise;Palmer,1998
3. Our Common Future; Report of the World Commission on Environment and Development Transmitted to the General Assembly as an Annex to Document A/42/427http://www.ask-force.org/web/Sustainability/Brundtland-Our-Common-Future-1987-2008.pdf
4. Report of the United Nations Conference on Environment and Development. In: Rio de Janeiro (3–14 June 1992) A/CONFhttps://globalforestcoalition.org/wp-content/uploads/2010/12/Rio-Declaration-on-Environment-and-Development-principles1.pdf