APA (7th ed.) Citation

White, J. (2001). London in the twentieth century: A city and its people. Penguin Books Ltd..

Chicago Style (17th ed.) Citation

White, Jerry. London in the Twentieth Century: A City and Its People. London: Penguin Books Ltd., 2001.

MLA (9th ed.) Citation

White, Jerry. London in the Twentieth Century: A City and Its People. Penguin Books Ltd., 2001.