Glenda A. Gunter,  The Effects of the Impact of Instructional Immediacy on Cognition and Learning in Online Classes.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    November 2007, vol. 11(11). 729 - 735
    [viewed 19 March 2024]. Available from: https://publications.waset.org/pdf/481.