Não informado. (1972). Mechanism and Machine Theory. Pergamon Press.
Lua i Stíl Chicago (17ú heag.)Não informado. Mechanism and Machine Theory. Elmsford, NY: Pergamon Press, 1972.
Lua MLA (8ú heag.)Não informado. Mechanism and Machine Theory. Pergamon Press, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.