Mardiyah M. Total Quality Management for High Quality Education Strategy at Pondok Modern Darussalam Gontor Ponorogo. QLMN [Internet]. 2023 Aug. 31 [cited 2025 Dec. 28];15(2):745-56. Available from: https://ejournal.insuriponorogo.ac.id/index.php/qalamuna/article/view/2604