Malathi Balakrishnan and  Shabeshan Rengasamy and  Mohd Salleh Aman,  Effect of Teaching Games for Understanding Approach on Students- Cognitive Learning Outcome.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    May 2011, vol. 53(5). 714 - 716
    [viewed 17 February 2020]. Available from: https://publications.waset.org/pdf/10137.