APA (7th ed.) Citation

Guillaume, A. (1956). Islam / by Alfred Guillaume (2nd ed.). Penguin.

Chicago Style (17th ed.) Citation

Guillaume, Alfred. Islam / by Alfred Guillaume. 2nd ed. Harmondsworth: Penguin, 1956.

MLA (9th ed.) Citation

Guillaume, Alfred. Islam / by Alfred Guillaume. 2nd ed. Penguin, 1956.

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