1. Alias, N., Siraj, S., Rahman, M., Ujang, A., Gelamdin, R., & Said, A. (2013). Research and trends in the studies of WebQuest from 2005 to 2012. Procedia – Social and Behavioral Sciences, 103, 763-772.
2. Azer, S. (2008). Navigating problem based learning. Elsevier: Churchill Livingstone.
3. Barrows, H. (1986). A taxonomy of problem-based learning methods. Medical Education, 20, 481–6.
4. Barton, R. (2004). Teaching secondary science with ICT. Maidenhead: Open University Press.
5. Bellofatto, L., Bohl, N., Casey, M., Krill, M., & Dodge, B. (2001). A rubric for evaluating WebQuests. Available from: http://webquest.sdsu.edu/webquestrubric.html (Accessed 25/06/2012).