Badr, Gamal Moursi (). „Islamic Law: Its Relation to Other Legal Systems”. American Journal of Comparative Law. 26 (2 [Proceedings of an International Conference on Comparative Law, Salt Lake City, Utah, February 24–25, 1977]): 187–98. doi:10.2307/839667. JSTOR839667.
Badr, Gamal Moursi (). „Islamic Law: Its Relation to Other Legal Systems”. The American Journal of Comparative Law. 26 (2 [Proceedings of an International Conference on Comparative Law, Salt Lake City, Utah, February 24–25, 1977]): 187–98 [196–8]. doi:10.2307/839667. JSTOR839667.
Passas, Nikos (). „Demystifying Hawala: A Look into its Social Organization and Mechanics”. Journal of Scandinavian Studies in Criminology and Crime Prevention. 7 (suppl 1): 46–62. doi:10.1080/14043850601029083.
Badr, Gamal Moursi (). „Islamic Law: Its Relation to Other Legal Systems”. American Journal of Comparative Law. 26 (2 [Proceedings of an International Conference on Comparative Law, Salt Lake City, Utah, February 24–25, 1977]): 187–98. doi:10.2307/839667. JSTOR839667.
Badr, Gamal Moursi (). „Islamic Law: Its Relation to Other Legal Systems”. The American Journal of Comparative Law. 26 (2 [Proceedings of an International Conference on Comparative Law, Salt Lake City, Utah, February 24–25, 1977]): 187–98 [196–8]. doi:10.2307/839667. JSTOR839667.