APA (7th ed.) Citation

Webb, S., & Webb, B. P. (1920). The history of trade unionism (Rev. ed, extended to 1920.). Longmans, Green, and Co.

Chicago Style (17th ed.) Citation

Webb, Sidney, and Beatrice Potter Webb. The History of Trade Unionism. Rev. ed, extended to 1920. London [etc.]: Longmans, Green, and Co, 1920.

MLA (9th ed.) Citation

Webb, Sidney, and Beatrice Potter Webb. The History of Trade Unionism. Rev. ed, extended to 1920. Longmans, Green, and Co, 1920.