Ad-Din, A. B. S., & Martin. (1992). The book of certainty: The sufi doctrine of faith, vision and gnosis (Second Edition.). Islamic Texts Society.
Chicago Style (17th ed.) CitationAd-Din, Abu Bakar Siraj, and Martin. The Book of Certainty: The Sufi Doctrine of Faith, Vision and Gnosis. Second Edition. UK: Islamic Texts Society, 1992.
MLA (8th ed.) CitationAd-Din, Abu Bakar Siraj, and Martin. The Book of Certainty: The Sufi Doctrine of Faith, Vision and Gnosis. Second Edition. Islamic Texts Society, 1992.
Warning: These citations may not always be 100% accurate.