Sugiana, Astrid Meilasari, and Jumintono Jumintono. “Governing Indonesia’s Secondary Education System: Challenges and Opportunities for Improvement in the Province of Yogyakarta”. Proceeding of International Conference on Islamic Education (October 31, 2016): 87-106. Accessed May 12, 2026. https://proceeding.ittishal.net/index.php/icie/article/view/11.