APA (7th ed.) Citation
Schuon, F. (1972). Understanding Islam. Penguin Books.
Chicago Style (17th ed.) Citation
Schuon, Frithjof. Understanding Islam. Baltimore: Penguin Books, 1972.
MLA (9th ed.) Citation
Schuon, Frithjof. Understanding Islam. Penguin Books, 1972.
Warning: These citations may not always be 100% accurate.