Sustentável, C. d. N. U. s. D. (2012). Zero net land degradation: A sustainable development goal for Rio+20: to secure the contribuition of our planet's land and soil to sustainable development, including food security and poverty eradication.
Lua i Stíl Chicago (17ú heag.)Sustentável, Conferência das Nações Unidas sobre Desenvolvimento. Zero Net Land Degradation: A Sustainable Development Goal for Rio+20: To Secure the Contribuition of Our Planet's Land and Soil to Sustainable Development, Including Food Security and Poverty Eradication. 2012.
Lua MLA (9ú heag.)Sustentável, Conferência das Nações Unidas sobre Desenvolvimento. Zero Net Land Degradation: A Sustainable Development Goal for Rio+20: To Secure the Contribuition of Our Planet's Land and Soil to Sustainable Development, Including Food Security and Poverty Eradication. 2012.