Siahaan, Sarifah. “The Effectiveness of Principal’s Academic Supervision in Enhancing Teachers’ Pedagogical Competency: A Systematic Literature Review”. PPSDP International Journal of Education 4, no. 2 (August 9, 2025): 759–772. Accessed July 10, 2026. https://ejournal.ppsdp.org/index.php/pijed/article/view/571.