A. Setiyowati, C. J. Putri, F. M. Jannah, and M. R. As’ad, “Kepemimpinan Islam Periode Khulafaur Rasyidin (Abu Bakar, Umar bin Khattab, Utsman bin Affan, Ali bin Abi Thalib)”, yasin, vol. 1, no. 2, pp. 262-274, Dec. 2021.