WASET
    Y. Bi and  T. Anderson and  M. Huang,  Investigating the Relation between Student Engagement and Attainment in a Flexible Learning Environment.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    June 2013, vol. 78(6). 1823 - 1827
    [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/1137.