WASET
    Jeffrey R. Mueller,  Upon Further Reflection: More on the History, Tripartite Role, and Challenges of the Professoriate.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    October 2015, vol. 106(10). 3542 - 3547
    [viewed 16 April 2024]. Available from: https://publications.waset.org/pdf/10002770.