Khalifah zuhud : Umar bin Abdul Aziz - al-Makki, Muhammad Nuruddin al-Banjari, 1960- (Shah Alam, Selangor : PSN Pub., 2012)
Keywords: 'Umar -- II, -- Caliph, -- d. 720.; Caliphs -- Biography; Islamic Empire -- History -- 661-750.