Rachman Widohardhono, Nurhasan, Edy Mintarto, and Miftakhul Jannah. “Psychological Competencies and 100 Meter Runner Student Athletes’ Performance”. IJORER : International Journal of Recent Educational Research, Vol. 2, no. 6, Nov. 2021, pp. 623-34, doi:10.46245/ijorer.v2i6.173.