- The Holy Qur'an.
- Akhund Khurasani, Muhammad Kazim. (c. 1988). Kifāyat al-Uṣūl. Vol. 1. Qom: Mu'assasat Āl al-Bayt.
- Ibn al-Athir al-Jazari, Mubarak ibn Muhammad. (1988). Al-Nihāyah fī Gharīb al-Ḥadīth wa al-Athar. Vol. 4. Qom: Isma'iliyan.
- Ibn Manzur, Muhammad ibn Mukarram. (c. 1993). Lisān al-'Arab. Vol. 1, 3rd ed. Beirut: Dar al-Sadir.
- Fayyad, Muhammad Ishaq. (c. 1996). Muḥāḍarāt fī Uṣūl al-Fiqh. Vol. 5, 4th ed. (Lectures of Abu al-Qasim al-Khoei). Qom: Ansariyan.
- Fadil Muwahhidi Lankarani, Muhammad. (2002). Uṣūl-i Fiqh-i Shi'ah. Vol. 6. Qom: Markaz-e Fiqhi-ye A'immah Athar.
- Ha'iri Yazdi, Abd al-Karim. (n.d.). Durar al-Fawā'id. Qom: Mehr.
- Hurr al-'Amili, Muhammad ibn Hasan. (c. 1988). Tafṣīl Wasā'il al-Shī'ah ilā Taḥṣīl Masā'il al-Sharī'ah. Vol. 1. Qom: Mu'assasat Āl al-Bayt li-Iḥyā' al-Turath.
- Husayni Firuzaabadi, Sayyid Murtada. (c. 1980). 'Ināyat al-Uṣūl fī Sharḥ Kifāyat al-Uṣūl. Vol. 4. Qom: Firuzaabadi.
- Husayni Shirazi, Sayyid Muhammad. (c. 1990). Al-Uṣūl. Vol. 5. Qom: Matba'at Sayyid al-Shuhada'.
- Husayni al-Zabidi, Muhammad Murtada. (c. 1993). Tāj al-'Arūs min Jawāhir al-Qāmūs. Vol. 5. Beirut: Dar al-Fikr.
- Isfahani, Muhammad Husayn. (c. 1983). Al-Fuṣūl al-Gharawiyyah fī al-Uṣūl al-Fiqhiyyah. Qom: Dar Ihya' al-'Ulum al-Islamiyyah.
- Isfahani, Muhammad Husayn. (c. 1995). Buḥūth fī al-Uṣūl. 2nd ed. Qom: Mu'assasat al-Nashr al-Islami.
- Kafi, Husayn, & Shari'ati, Sa'id. (2011). Applied Principles of Islamic Jurisprudence. Vol. 1, 6th ed. Qom: Subhan.
- Khomeini, Ruhollah. (c. 1994). Minhāj al-Uṣūl. Vol. 2. Qom: Institute for Compilation and Publication of Imam Khomeini's Works.
- Makarem Shirazi, Naser. (c. 1995). Anwār al-Uṣūl. Vols. 1–2. Qom: Madrasat al-Imam Ali ibn Abi Talib.
- Masjidsaraei, Hamid, & Mousavi, Sayyid Rasul. (2021). "The Influential Applications of Itlāq Maqāmī in Principles of Jurisprudence." Fiqh Researches, 17, 1–27.
- Meshkini, Mirza Ali. (1992). Taḥrīr al-Ma'ālim fī Uṣūl al-Fiqh. Qom: Mehr.
- Muzaffar, Muhammad Rida. (n.d.). Uṣūl al-Fiqh. Vol. 1. Qom: Isma'iliyan.
- Musavi Bujnordi, Sayyid Hasan. (1992). Muntahā al-Uṣūl. n.p.: Basirati.
- Sadr, Sayyid Muhammad Baqir. (1985). Buḥūth fī 'Ilm al-Uṣūl. Vols. 1 & 7. Reported by Sayyid Mahmud Hashimi Husayni. Qom: Majma' al-'Ilmi al-Shahid al-Sadr.
- Sadri, Sayyid Muhammad. (2006). Mabādi' al-Uṣūl. 6th ed. Tehran: Payam Noor University.
- Saduq, Muhammad ibn Ali ibn Husayn ibn Babawayh al-Qummi. (c. 2006). Man Lā Yaḥḍuruhu al-Faqīh. Vol. 1. Qom: Mu'assasat al-Nashr al-Islami.
- Subhani Tabrizi, Ja'far. (2003). Al-Mūjaz fī Uṣūl al-Fiqh. Vol. 2. Qom: Mu'assasat al-Imam al-Sadiq.
- Tabataba'i Ha'iri (Sayyid Mujahid), Sayyid Muhammad ibn Ali. (c. 2007). Mafātīḥ al-Uṣūl. Qom: Mu'assasat Āl al-Bayt li-Iḥyā' al-Turath.
- Nuri (Kalantari), Mirza Abu al-Qasim ibn Muhammad Ali. (n.d.). Maṭāriḥ al-Anẓār (Lectures on Shaykh Ansari's Principles of Jurisprudence). Qom: Mu'assasat Āl al-Bayt.