Implementasi Sistem Manajemen Mutu ISO 9001 di SMP Muhammadiyah 1 Berbah Sleman. Al-Ilmiya [Internet]. 2025 Jul. 24 [cited 2025 Aug. 1];1(1):1-7. Available from: https://journal.al-afif.org/index.php/al-ilmiya/article/view/118