BILAL, F.; ASTUTIK , A. P. 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, [S. l.], v. 27, n. 1, p. 10.21070/ijins.v27i1.1261, 2026. DOI: 10.21070/ijins.v27i1.1261. Disponível em: https://ijins.umsida.ac.id/index.php/ijins/article/view/1261. Acesso em: 10 oct. 2026.