Cita APA (7a ed.)

Ballard, M., Mathias, P., Floyd, G., & Jordan, S. (1971). Revolutions and steam engines: 1775- 1815. Methuen.

Cita Chicago Style (17a ed.)

Ballard, Martin, Peter Mathias, Gareth Floyd, y Stuart Jordan. Revolutions and Steam Engines: 1775- 1815. London [u.a.]: Methuen, 1971.

Cita MLA (9a ed.)

Ballard, Martin, et al. Revolutions and Steam Engines: 1775- 1815. Methuen, 1971.