Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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