Muhammed Yousoof and  Mohd Sapiyan and  Khaja Kamaluddin,  A Proposed Framework for Visualization to Teach Computer Science.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    December 2007, vol. 12(12). 840 - 843
    [viewed 19 October 2021]. Available from: https://publications.waset.org/pdf/2948.