APA Style

ad-Din, A, B, S. (1996). The book of certainty, the sufi doctrine of faith vision and gnosis (First ed.). U.K: The Islamic Text Society.

MLA Style

ad-Din, Abu, Bakr, Siraj. "The book of certainty, the sufi doctrine of faith vision and gnosis". First ed. U.K: The Islamic Text Society, 1996. Text.