^Al-Bīrūnī: commemorative volume, Hakim Mohammad Said, Pakistan. Ministry of Education, Unesco, Hamdard National Foundation, Pakistan, 2010
^The memoirs of Sufis written in India: reference to Kashaful-mahjub, Siyar-ul-auliya, and Siyar-ul-arifin, Mahmud Husain Siddiqui, Dept. of Persian, Urdu, and Arabic, Faculty of Arts, Maharaja Sayajirao University of Baroda, 2009
^Hodgson, Marshall G.S. The Venture of Islam, Vol 1: The Classical Age of Islam. Chicago and London: University of Chicago Press. 1958: 394.
^The most recent version of the Risâla is the translation of Alexander Knysh, Al-Qushayri's Epistle on Sufism: Al-risala Al-qushayriyya Fi 'ilm Al-tasawwuf (ISBN 978-1-85964-186-6). Earlier translations include a partial version by Rabia Terri Harris (Sufi Book of Spiritual Ascent) and complete versions by Harris, and Barbara R. Von Schlegell.
^For the pre-modern era, see Vincent J. Cornell, Realm of the Saint: Power and Authority in Moroccan Sufism, ISBN 978-0-292-71209-6; and for the colonial era, Knut Vikyr, Sufi and Scholar on the Desert Edge: Muhammad B. Oali Al-Sanusi and His Brotherhood, ISBN 978-0-8101-1226-1.
^Leonard Lewisohn, The Legacy of medieval Persian Sufism, Khaniqahi-Nimatullahi Publications, 1992.