Karim, A., A. Kartiko, D. Daulay, and I. D. Kumalasari. “The Effect of The Supervision of The Principal and The Professional Competency of Teachers on Teacher Performance in Private MI in Pacet District”. Nidhomul Haq : Jurnal Manajemen Pendidikan Islam, Vol. 6, no. 3, Nov. 2021, pp. 497-12, doi:10.31538/ndh.v6i3.1686.