WASET
    Elena A. Railean,  Scientific Methods in Educational Management: The Metasystems Perspective.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    July 2021, vol. 175(7). 664 - 670
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10012133.