Andi Herwin, and Wiwik Wijayanti. “Performance of Vocational High School Supervisors in Indragiri Hilir Regency”. International Journal of Educational Technology Research 2, no. 4 (February 15, 2025): 692–699. Accessed June 24, 2026. https://jurnalinternasional.com/index.php/ijetr/article/view/277.