Saputra H, Italina C. The Role of Principal’s Leadership in Improving the Quality of Mathematics Education at Junior High School Kembang Tanjong. JMAS [Internet]. 2020Oct.31 [cited 2026May1];3(4):98-102. Available from: https://www.exsys.iocspublisher.org/index.php/JMAS/article/view/75