APA (7th ed.) Citation

Ensor, R. C. K. (1939). Who Hitler is. Clarendon Press.

Chicago Style (17th ed.) Citation

Ensor, R. C. K. Who Hitler Is. Oxford: Clarendon Press, 1939.

MLA (9th ed.) Citation

Ensor, R. C. K. Who Hitler Is. Clarendon Press, 1939.

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