1. Bones, B. (1994). Getting started. A guide to bringing environmental education into your classroom. Washington, DC: The National Environmental Education and Training Foundation.
2. Dahlstrom, L. (1995). Teacher education for independent Namibia: From the liberation struggle to a national agenda. Journal of Education for Teaching, 21, 273–288.
3. Dawe, G., Jucker, R., & Martin, S. (2005). Sustainable development in higher education: Current practice and future developments a report for the higher education academy. Heslington, NY: Higher Education Academy.
4. Dreyer, J., & Loubser, C. (2005). Curriculum development, teaching and learning for the environment. In C. P. Loubser (Ed.), Environmental education: Some South African perspectives (pp. 127–153). Cape Town, South Africa: Van Schaik.
5. Enviroteach. (1995). Investigating of opportunities for the implementation of Enviroteach programmes in Namibia colleges of education. Windhoek, Namibia: DRFN.