Shafii, M. i. I. (1997). Al-Imam Muhammad ibn Idris al-Shafii's al Risala fi usul al-fiqh: Treatise on the foundations of Islamic jurisprudence (2nd ed., repr.). Islamic Texts Society.
Chicago Style (17th ed.) CitationShafii, Muhammad ibn Idris. Al-Imam Muhammad Ibn Idris Al-Shafii's Al Risala Fi Usul Al-fiqh: Treatise on the Foundations of Islamic Jurisprudence. 2nd ed., repr. Cambridge: Islamic Texts Society, 1997.
MLA (9th ed.) CitationShafii, Muhammad ibn Idris. Al-Imam Muhammad Ibn Idris Al-Shafii's Al Risala Fi Usul Al-fiqh: Treatise on the Foundations of Islamic Jurisprudence. 2nd ed., repr. Islamic Texts Society, 1997.
Warning: These citations may not always be 100% accurate.