APA (7th ed.) Citation

Lings, M. (1975). What is Sufism? (1. publ.). Allen & Unwin.

Chicago Style (17th ed.) Citation

Lings, Martin. What Is Sufism? 1. publ. London: Allen & Unwin, 1975.

MLA (9th ed.) Citation

Lings, Martin. What Is Sufism? 1. publ. Allen & Unwin, 1975.

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