al-Bidayah wan nihayah : zaman Khulafa'ur Rasyidin : yang pertama dan yang terakhir - Ibn Kathir, Isma'il ibn'Umar, ca. 1301-1373; Mohammad Isfahan Al-Qari (Batu Caves, Selangor : Crescent News, 2013)
Keywords: Caliphs -- History; Islam and politics -- Islamic Empire -- History; Islamic Empire -- History; Islamic Empire -- Politics and government