APA (7th ed.) Citation

Richards, D., & Quick, A. (1979). Twentieth Century Britain (1. publ., new impression.). Longmans.

Chicago Style (17th ed.) Citation

Richards, Denis, and Anthony Quick. Twentieth Century Britain. 1. publ., new impression. London: Longmans, 1979.

MLA (9th ed.) Citation

Richards, Denis, and Anthony Quick. Twentieth Century Britain. 1. publ., new impression. Longmans, 1979.