Auni, Muhammad Abdul Muin and , Andri Nirwana AN, S.Th., M.Ag., Ph.D and , Dr. Muthoifin, M.Ag (2020) Arou Al Imam As Syafi'i Fi Al Buyu' Al Iliktruniyyah Min Kitabihi Al Um. Thesis thesis, Universitas Muhammadiyah Surakarta.