APA Edition Citation

Al-Qushayri & Schlegell, V. B. R. (1990). Principles of sufism. Other Books.

Chicago Edition Citation

Al-Qushayri and Von B. R. Schlegell. Principles of Sufism. Calicut: Other Books, 1990.

MLA Edition Citation

Al-Qushayri and Von B. R. Schlegell. Principles of Sufism. Other Books, 1990.

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