↑ Gaudiosi, Monica M. (April 1988), "The Influence of the Islamic Law of Waqf on the Development of the Trust in England: The Case of Merton College", University of Pennsylvania Law Review136 (4): 1231-1261
↑ Badr, Gamal Moursi (Spring, 1978), "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): 187-198 [196-8] Check date values in: |date= (bantuan)
↑ Hudson, A. (2003), Equity and Trusts (3rd ed.), Cavendish Publishing, 32, ISBN 1-85941-729-9