APA (7th ed.) Citation

Shah, I. (1972). Thinkers of the East. Penguin Books.

Chicago Style (17th ed.) Citation

Shah, Idries. Thinkers of the East. Harmondsworth: Penguin Books, 1972.

MLA (9th ed.) Citation

Shah, Idries. Thinkers of the East. Penguin Books, 1972.