Cita APA (7a ed.)

Webb, S., & Webb, B. P. (1997). The history of trade unionism. University Microfilms International.

Cita Chicago Style (17a ed.)

Webb, Sidney, y Beatrice Potter Webb. The History of Trade Unionism. Ann Arbor: University Microfilms International, 1997.

Cita MLA (9a ed.)

Webb, Sidney, y Beatrice Potter Webb. The History of Trade Unionism. University Microfilms International, 1997.