Yolanda S, M S, Sulastri S. Principal Leadership in Improving Teacher Professionalism in Terms of: Leadership Models and Strategies. IJEDS [Internet]. 2022 Dec. 1 [cited 2026 Apr. 25];5(1):101-7. Available from: https://ijeds.ppj.unp.ac.id/index.php/IJEDS/article/view/369