Doi, Abd ar-Rahman I., and Clarke, Abdassamad (2008). Shari'ah: Islamic Law. Ta-Ha Publishers Ltd., (hardback) Cilardo, Agostino, "Fiqh, History of", in Muhammad in History, Thought, and Culture: An Encyclopedia of the Prophet of God'' (2 vols.), Edited by C. Fitzpatrick and A. Walker, Santa Barbara, ABC-CLIO, 2014, Vol I, pp. 201–206.
Doi, Abd ar-Rahman I., and Clarke, Abdassamad (2008). Shari'ah: Islamic Law. Ta-Ha Publishers Ltd, (hardback) Cilardo, Agostino, "Fiqh, History of", in Muhammad in History, Thought, and Culture: An Encyclopedia of the Prophet of God'' (2 vols.), Edited. by C. Fitzpatrick and A. Walker, Santa Barbara, ABC-CLIO, 2014, Vol I, pp. 201–206.