4 1 10 Firdaus A.N Primary Author mixed material Jakarta Pedoman Ilmu Jaya 1988 rak_26_7_kekhalifahan_umar_bin_abdul_aziz.jpg.jpg Firdaus A.N Additional Author Al jundi Additional Author Ali Muhammad Additional Author Delta Washkita S Additional Author mixed material Jakarta Fakultas Adab dan Humaniora UIN Syarif Hidayatullah 2017 Firdaus A.N Primary Author mixed material Jakarta Pedoman Ilmu Jaya 1995 B190518.jpg.jpg Gordon, C.D Additional Author Firdaus A.N Additional Author Ahmad Royani Arief Additional Author mixed material Jakarta Fakultas Adab dan Humaniora UIN Syarif Hidayatullah 2017