1. Ausubel, D. P., Novak, J. S., & Hanesian, H. (1978). Educational psychology: A cognitive view. New York: Holt, Rinehart & Winston.
2. How good is my concept map? Am I a good Cmapper?;Ca-as;Knowledge Management & E-Learning,2015
3. Leo: A Learning Environment Organizer to Support Computer-Mediated Instruction
4. Collis, B., & Moneen, J. (2001). Flexible Learning in a digital world. London: Kogan Page.