UNESCO (2005) Guidelines and Recommendations for Reorienting Teacher Education to Address Sustainability. Education for Sustainable Development in Action Technical Paper No. 2, UNESCO Education sector.
http://unesdoc.unesco.org/images/0014/001433/143370E.pdf
UNESCO (2007) Good Practices in Teacher Education Institutions. Education for Sustainable Development in Action, Good Practices No. 1- 2007, UNESCO Education sector.
http://unesdoc.unesco.org/images/0015/001524/152452eo.pdf