Zuraini Hanim Zaini and  Wan Fatimah Wan Ahmad,  Effectiveness and Usability Evaluation of 'Li2D' Courseware.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    February 2011, vol. 50(2). 149 - 152
    [viewed 22 January 2021]. Available from: https://publications.waset.org/pdf/5099.