1. Achtemeier, S. D., Morris, L. V., & Finnegan, C. L. (2003, February). Considerations for developing evaluations of online courses. Journal of Asynchronous Learning Networks, 7(1). Retrieved January 20, 2008, from http://www.sloan-c.org/publications/JALN/v7n1/pdf/v7n1_achtemeier.pdf
2. Learners still learn from experience when online;S.Alexander;Teaching & learning online: Pedagogies for new technologies,2001
3. Allen, I. E., & Seaman, J. (2005, November). Growing by degrees: Online education in the United States.Retrieved January 3, 2008, from http://www.sloan-c.org/publications/survey/pdf/growing_by_degrees.pdf.
4. Allen, I. E., & Seaman, J. (2007, October). Online nation: five years of growth inonline learning. Retrieved September 1, 2007, from http://www.sloan-c.org/publications/survey/pdf/online_nation.pdf
5. Arabasz, P., Pirani, J. A., & Fawcett, D. (2003). Supporting e-learning in higher education. EDUCAUSE Center for Applied Research, 3. Retrieved January 20, 2008, from http://www.educause.edu/ir/library/pdf/ers0303/rs/ers0303w.pdf