APA (7th ed.) Citation

Webb, S., Webb, B. P., Webb, S., & Webb, B. P. (1929). English local government. Cass.

Chicago Style (17th ed.) Citation

Webb, Sidney, Beatrice Potter Webb, Sidney Webb, and Beatrice Potter Webb. English Local Government. London: Cass, 1929.

MLA (8th ed.) Citation

Webb, Sidney, et al. English Local Government. Cass, 1929.