Nabil Amir, Ahmad, and Tasnim Abdul Rahman. “Early Ideas of Reform in Hamka’s Ayahku: A Historical and Religious Struggle of Muhammadiyah in Minangkabau”. Madani: Jurnal Politik Dan Sosial Kemasyarakatan, vol. 16, no. 2, Aug. 2024, pp. 344-58, https://ejournal.unisda.ac.id/index.php/MADANI/article/view/12644.