Dhaifullah, Mhd Arya, et al. “Systematic Analysis of School Leadership in Vocational Education Settings: Structure, Roles, and Challenges”. International Journal of Emerging Technology and Engineering Education, vol. 1, no. 2, May 2025, pp. 120-4, https://ijeteed.ppj.unp.ac.id/index.php/ijeteed/article/view/51.