STEENBRINK, Karel. Hamka (1908-1981) and the Integration of the Islamic Ummah of Indonesia. Studia Islamika, [S. l.], v. 1, n. 3, 2014. DOI: 10.15408/sdi.v1i3.851. Disponível em: https://studiaislamika.ppimcensis.or.id/index.php/studia-islamika/article/view/851. Acesso em: 16 jun. 2025.