Naẓarīyat al-ribā al-muḥarram fī al-sharīʻah al-Islāmīyah - Badawī, Ibrāhīm Zakī al-Dīn, (Maṭbūʻāt al-Majlis al-Aʻlá li-Riʻāyat al-Funūn wa-al-Ādāb wa-al-ʻUlūm al-Ijtimāʻīyah ;)