Kusmaduni F, Akhyak A, Maunah B. The Role of the Principal as a Leader in Shaping Effective Schools: A Multi-case Study at MAN 1 Tulungagung and SMAN 1 Kedungwaru. IJSTM [Internet]. 2026 Jan. 26 [cited 2026 Jan. 31];7(1):171-8. Available from: https://ijstm.inarah.co.id/index.php/ijstm/article/view/1412