M. Alang Khairun Nizar. THE EFFECT OF PRINCIPAL’S LEADERSHIP AND EDUCATIONAL PERFORMANCE ON IMPROVING THE QUALITY OF EDUCATION IN MTS BUSTANUL’ULUM GUPPI TEBING TINGGI CITY. IJSET [Internet]. 2023 Aug. 11 [cited 2025 Oct. 5];2(9):522-30. Available from: https://www.ijset.org/index.php/ijset/article/view/209