APA (7th ed.) Citation

Clark, G. N. S. (1971). English history: A survey. Clarendon Press.

Chicago Style (17th ed.) Citation

Clark, George Norman Sir. English History: A Survey. Oxford: Clarendon Press, 1971.

MLA (9th ed.) Citation

Clark, George Norman Sir. English History: A Survey. Clarendon Press, 1971.