Jaya, Indra, and Wedra Aprison. “High School Teachers’ Performance in Term of Transformational Leadership and Principle Supervision Competencies”. Jurnal Educative: Journal of Educational Studies 6, no. 2 (December 31, 2021): 167–177. Accessed January 30, 2026. https://ejournal.uinbukittinggi.ac.id/index.php/educative/article/view/4791.