(en) Meir Hatina, Guardians of faith in modern times : ʻulamaʼ in the Middle East, Leiden, Brill, , 342 p. (ISBN978-90-04-16953-1, lire en ligne), p. 221
(en) Abdulrahman Yahya Baamir, Shari’a Law in Commercial and Banking Arbitration : Law and Practice in Saudi Arabia, Routledge, (ISBN1-138-27706-1 et 978-1-138-27706-9, OCLC982610662), chap. 1 (« An Introduction to the Law and Economics of Saudi Arabia »), p. 28