Beckwith, T. G., Buck, N. L., & Maragoni, R. D. (1982). Mechanical measurements (3a. ed.). Addison-Wesley.
Lua i Stíl Chicago (17ú heag.)Beckwith, Thomas G., N. Lewis Buck, agus Roy D. Maragoni. Mechanical Measurements. 3a. ed. Reading: Addison-Wesley, 1982.
Lua MLA (9ú heag.)Beckwith, Thomas G., et al. Mechanical Measurements. 3a. ed. Addison-Wesley, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.