Biography empat serangkai imam mazhab (Hanafy-Maliki -Syafi'iy-Hanbaly) - Chalil, Moenawar, Haji (Jakarta : Bulan Bintang, 1965)
Keywords: Malik ibn Anas, -- d. 795; Ibn Hanbal, Ahmad ibn Muhammad, -- 780-855; al-Shafi'i, Muhammad ibn Idris, -- 767 or 8-820; Abu Hanifah, -- d. 767 or 8