Lisnasari, S.F. et al. 2023. The Importance of Principal Leadership Management in Increasing the Competence of Elementary School Teachers in Medan City, North Sumatra . International Journal of Multidisciplinary: Applied Business and Education Research. 4, 2 (Feb. 2023), 609–615. DOI:https://doi.org/10.11594/ijmaber.04.02.27.