Muhammed Yousoof and  Mohd Sapiyan and  Khaja Kamaluddin,  Reducing Cognitive Load in Learning Computer Programming.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2007, vol. 12(12). 4100 - 4103
    [viewed 03 June 2020]. Available from: https://publications.waset.org/pdf/487.