WASET
    Behnaz Mohajeran and  Alireza Ghaleei,  Principal Role and School Structure.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    April 2008, vol. 16(4). 357 - 366
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/14640.