1. Foundations of educational theory for online learning;Ally,2004
2. Toward A Theory of Online Learning;Anderson,2004
3. Belyk, D., Schubert, J., Baggaley, J., 2005. Classification of DE Delivery Systems Masters of Distance Education Program Centre for Distance Education Athabasca University. (accessed 25.01.07).
4. The e-learning answer;Berke;Nursing Management Supplement: IT Solutions,2003
5. WebCT as an E-Learning Tool: A Study of Technology Students’ Perceptions;Burgess;Journal of Technology Education,2003