Veronika Sri Agestiningsih, and Lilis Suwandari. “Principal’s Leadership Management in Improving the Professional Competence of High School Teachers”. Journal of Science and Education (JSE) 6, no. 1.2 (December 4, 2025): 1-13. Accessed December 23, 2025. https://jse.rezkimedia.org/index.php/jse/article/view/686.