1. Aighewi, I. T., & Osaigbovo, U. A. (2006). Basic environmental science training for tertiary Institutions: A call for worldwide adoption. In C. Brito & M. M. Ciampi (Eds.), Environmental and health world congress. Santos: COPEC.
2. Alabaster, T., & Blair, D. (1996). Greening the university. In J. Huckle & S. Sterling (Eds.), Education for sustainability (pp. 86–104). London: Earthsam.
3. Allen, J. (Ed.). (2007). The global environment: An emerging world view. In Environment: Annual Editions 07/08 (26th ed, pp. 4–17). Dubuque: McGraw Hill.
4. American Council on Education. (2006). Students on the move: Future of International Students in the United States ACE Center for International Initiatives. Retrieved on July 15, 2008 from www.Acenet.edu/programs/international .
5. Association of University Leaders for Sustainable Future (AULSF). (1990). The Talloires declaration: University Presidents for a sustainable future. Retrieved October 20, 2008 from http://www.issd.org/educate/declarat/talloires.html .