APA (7th ed.) Citation

Webb, S., & Webb, B. P. (1923). The decay of capitalist civilisation. Fabian Society [u.a.].

Chicago Style (17th ed.) Citation

Webb, Sidney, and Beatrice Potter Webb. The Decay of Capitalist Civilisation. London: Fabian Society [u.a.], 1923.

MLA (9th ed.) Citation

Webb, Sidney, and Beatrice Potter Webb. The Decay of Capitalist Civilisation. Fabian Society [u.a.], 1923.