1. Allen, M. W. (2007). Designing Successful e-Learning. San Francisco: Pfeiffer.
2. Barab, S., Scott, B., Siyahhan, S., Goldstone, R., Ingram-Goble, A., Zuiker, S., & Warren, S. (2009). Transformational play as a curricular scaffold: Using videogames to support science education. Journal of Science Education and Technology, 18(4), 305-320.
3. Facer, K. (2003). Computer Games and Learning: Why Do We Think it’s Worth Talking About Computer Games and Learning in The Same Breath? Retrieved from http://www2.futurelab.org.uk
4. Gros, B. (2007). Digital Games in Education: The Design of Games-Based Learning Environments. Journal of Research on Technology in Education. 40(1): 23–38.
5. Hsu, C. Y., & Tsai, C. C. (2013). Examining the effects of combining self-explanation principles with an educational game on learning science concepts. Interactive Learning Environments, 21(2), 104–115.
6. Lee, Y. L. (2009). Enhancement of Fractions from Playing a Game. Proceedings of the 32nd Annual Conference of the Mathematics (pp. 323-330). Crossing divides: MERGA 32
7. Milosevic, D., Milicevic, B., Besic, C., and Bozovic, M. (2010). Applying Educational Games in Primary School Education. Technics Technologies Education Management. 5(4): 693-699.
8. Squire, K. and Jenkins, H. (2003). Harnessing the Power of Games in Education, InSight. 3: 5-33.
9. Fatimah, W. A. and Hidayah, N. A. L. (2010). Development of a Mathematic Courseware: Fractions. Perak: Universiti Teknologi PETRONAS.