AMIR, A. N. Sistem Politik Islam di Zaman Nabi Muhammad S.A.W. Jurnal Usuluddin, [S. l.], v. 29, p. 221–251, 2009. Disponível em: https://ejournal.um.edu.my/index.php/JUD/article/view/7311. Acesso em: 3 may. 2024.