Cita APA (7a ed.)

Richards, D., & Quick, A. (1977). Twentieth Century Britain (1. publ., new impression.). Longmans.

Cita Chicago Style (17a ed.)

Richards, Denis, y Anthony Quick. Twentieth Century Britain. 1. publ., new impression. London: Longmans, 1977.

Cita MLA (9a ed.)

Richards, Denis, y Anthony Quick. Twentieth Century Britain. 1. publ., new impression. Longmans, 1977.