Cita APA (7a ed.)

Webb, S., Webb, B. P., & MacKenzie, N. (1997). The letters of Sidney and Beatrice Webb. University Microfilms International.

Cita Chicago Style (17a ed.)

Webb, Sidney, Beatrice Potter Webb, y Norman MacKenzie. The Letters of Sidney and Beatrice Webb. Ann Arbor: University Microfilms International, 1997.

Cita MLA (9a ed.)

Webb, Sidney, et al. The Letters of Sidney and Beatrice Webb. University Microfilms International, 1997.