APA (7th ed.) Citation

Butler, D. E. (1963). The Electoral system in Britain since 1918 (2nd ed.). Clarendon.

Chicago Style (17th ed.) Citation

Butler, D. E. The Electoral System in Britain Since 1918. 2nd ed. Oxford: Clarendon, 1963.

MLA (9th ed.) Citation

Butler, D. E. The Electoral System in Britain Since 1918. 2nd ed. Clarendon, 1963.