Purnomo, Halim. “Muhammadiyah and Nahdlatul Ulama: The Spirit of Transformative and Character Education in Jeddah Indonesian Schools”. Al-Hikmah: Jurnal Agama dan Ilmu Pengetahuan 21, no. 2 (October 23, 2024): 159–173. Accessed June 13, 2026. https://journal.uir.ac.id/index.php/alhikmah/article/view/17175.