Istikomah, Taufik Churahman, and Budi Haryanto. “Buku Ajar Sistem Penjaminan Mutu Pesantren”. Umsida Press (July 13, 2022): 1–79. Accessed June 21, 2025. https://press.umsida.ac.id/index.php/umsidapress/article/view/1290.