Siahaan, A., R. H. Rambe, and A. Mukti. “Managerial Competence of School Principals in Improving Teacher Performance”. Nidhomul Haq : Jurnal Manajemen Pendidikan Islam, Vol. 9, no. 2, Aug. 2024, pp. 490-02, doi:10.31538/ndh.v9i2.5134.