Ginting, Ribka. “FUNGSI SUPERVISI KEPALA SEKOLAH TERHADAP KINERJA GURU”. JURNAL EDUKASI NONFORMAL 1, no. 1 (March 4, 2020): 88-93. Accessed November 23, 2024. https://ummaspul.e-journal.id/JENFOL/article/view/409.