APA (7th ed.) Citation

Lings, M. (1975). What is Sufism? George Allen and Unwin.

Chicago Style (17th ed.) Citation

Lings, Martin. What Is Sufism? George Allen and Unwin, 1975.

MLA (9th ed.) Citation

Lings, Martin. What Is Sufism? George Allen and Unwin, 1975.

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