al-Farooq : the life of Omar the great (the second caliph of Islam) - Shibli Numani, Muhammad, 1857-1914; Ali Khan, Maulvi Zafar (New Delhi : Idara Isha'at-E-Diniyat, 2005)
Keywords: 'Umar ibn al-Khattab, -- Caliph, -- d. 644; Caliphs -- Biography