Womack, J. P. (1990). The Machine that Changed the World. Rawson Associates.
Lua i Stíl Chicago (17ú heag.)Womack, James P. The Machine That Changed the World. Rawson Associates, 1990.
Lua MLA (9ú heag.)Womack, James P. The Machine That Changed the World. Rawson Associates, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.