1. The mystique of the earth. Thomas Berry’s vision for an Earth Democracy recognizes the unity between humans and the planet;Berry;Caduceus,2003
2. Ecological Literacy: Education and the Transition to a Postmodern World;Orr,1992
3. http://www.forumforthefuture.org.uk/publications/literacy_page256.aspx
4. Sustainability literacy: skills for living well into the future;Sterling;Ethos,2005