Elizabeth M. Hodge and  Sharon K. Collins and  Eric Kisling,  Virtual Environments...Vehicle for Pedagogical Advancement.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    June 2009, vol. 30(6). 980 - 985
    [viewed 18 April 2021]. Available from: https://publications.waset.org/pdf/15260.