Bilal, Farid, and Anita Puji Astutik. “Principal Managerial Innovation: Quality Improvement Strategy of Islamic Educational Institutions: Inovasi Manajerial Kepala Sekolah: Strategi Peningkatan Mutu Lembaga Pendidikan Islam”. Indonesian Journal of Innovation Studies 27, no. 1 (February 25, 2026): 10.21070/ijins.v27i1.1261. Accessed October 10, 2026. https://ijins.umsida.ac.id/index.php/ijins/article/view/1261.