APA (7th ed.) Citation

Lings, M. (1993). What is sufism? Islamic Texts Society.

Chicago Style (17th ed.) Citation

Lings, Martin. What Is Sufism? Cambridge: Islamic Texts Society, 1993.

MLA (9th ed.) Citation

Lings, Martin. What Is Sufism? Islamic Texts Society, 1993.

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