Palmer, A. (2020). Sainthood and authority in early Islam: Al-Ḥakīm al-Tirmidhī's Theory of wilāya and the reenvisioning of the Sunnī Caliphate. Brill.

Palmer, Aiyub. Sainthood and Authority in Early Islam: Al-Ḥakīm Al-Tirmidhī's Theory of Wilāya and the Reenvisioning of the Sunnī Caliphate. Leiden ; Boston: Brill, 2020.

Palmer, Aiyub. Sainthood and Authority in Early Islam: Al-Ḥakīm Al-Tirmidhī's Theory of Wilāya and the Reenvisioning of the Sunnī Caliphate. Brill, 2020.