Millennium Ecosystem Assessment (2005). Ecosystems and human well-being: biodiversity synthesis. World Resources Institute, Washington, DC. The full range of reports is available on the Millennium Ecosystem Assessment web site.[1]பரணிடப்பட்டது 2015-08-13 at the வந்தவழி இயந்திரம்.
Millennium Ecosystem Assessment (2005). Ecosystems and human well-being: biodiversity synthesis. World Resources Institute, Washington, DC. The full range of reports is available on the Millennium Ecosystem Assessment web site.[1]பரணிடப்பட்டது 2015-08-13 at the வந்தவழி இயந்திரம்.
Commonwealth of Australia (2007). "Defining Sustainability." House Standing Committee on Environment and Heritage, Inquiry into a Sustainability Charter. Chapter 2. Retrieved on 2009-02-16.