M. Basir. S. Hasibuan, Syawal Gultom, Wildansyah Lubis. EFFECTIVENESS OF PRINCIPAL COMPETENCY MANAGEMENT MODEL BASED ON LESSON STUDY IN IMPROVING THE QUALITY OF ACADEMIC SUPERVISION AND LEARNING IN STATE HIGH SCHOOLS. MORFAI [Internet]. 2025 Jul. 6 [cited 2025 Sep. 29];5(5):2594-601. Available from: https://radjapublika.com/index.php/MORFAI/article/view/3293