Anggraini, Dewi. “Analisis Pengawasan Sistem Pengajaran Di Edu Smart Learning Center Medan”. Jurnal ILMAN (Jurnal Ilmu Manajemen) 7, no. 1 (March 30, 2019): 19-27. Accessed September 4, 2026. https://www.journals.lppm-sukma.id/index.php/ilman/article/view/42.