APA (7th ed.) Citation

Shah, I. (1977). The Sufis. The Octagon Press.

Chicago Style (17th ed.) Citation

Shah, Idries. The Sufis. The Octagon Press, 1977.

MLA (8th ed.) Citation

Shah, Idries. The Sufis. The Octagon Press, 1977.

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