SUDRAJAT, Ajat. Khilafah Islamiyah dalam perspektif sejarah. Informasi, [S. l.], v. 35, n. 2, 2009. DOI: 10.21831/informasi.v2i2.6385. Disponível em: https://journal.uny.ac.id/index.php/informasi/article/view/6385. Acesso em: 1 jul. 2025.