APA (7th ed.) Citation

Lewis, B. (1940). The origins of Ismā'īlism: A study of the historical background of the Fāţimid Caliphate. Heffner.

Chicago Style (17th ed.) Citation

Lewis, Bernard. The Origins of Ismā'īlism: A Study of the Historical Background of the Fāţimid Caliphate. Cambridge: Heffner, 1940.

MLA (8th ed.) Citation

Lewis, Bernard. The Origins of Ismā'īlism: A Study of the Historical Background of the Fāţimid Caliphate. Heffner, 1940.

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