APA (7th ed.) Citation

Guillaume, A. (1956). Islam (2nd ed. (rev.).). Penguin Books.

Chicago Style (17th ed.) Citation

Guillaume, Alfred. Islam. 2nd ed. (rev.). Harmondsworth, Middlesex ; New York, N.Y.: Penguin Books, 1956.

MLA (9th ed.) Citation

Guillaume, Alfred. Islam. 2nd ed. (rev.). Penguin Books, 1956.