APA (7th ed.) Citation

Lings, M. (1999). What is sufism? The Islamic Texts Society.

Chicago Style (17th ed.) Citation

Lings, Martin. What Is Sufism? Cambridge: The Islamic Texts Society, 1999.

MLA (9th ed.) Citation

Lings, Martin. What Is Sufism? The Islamic Texts Society, 1999.

Warning: These citations may not always be 100% accurate.