Fiqh siyasah Khulafa ar-Rasyidin : Amirul mukminin Umar ibn Alkhatab r.a - Abdul Hadi Awang, Dato' Seri Haji, 1947- (Marang, Terengganu : MDQ Enterprise, 2013)
Keywords: 'Umar ibn al-Khattab, -- Caliph, -- d. 644; Umar ibn al-Khattab, -- d. 644 -- Contributions in politics; Constitutional law (Islamic law)