Dudley- Evans, T., Smart, T., & Wall, J. Engineering (4a ed.).
Lua i Stíl Chicago (17ú heag.)Dudley- Evans, Tony, Tim Smart, agus John Wall. Engineering. 4a ed.
Lua MLA (8ú heag.)Dudley- Evans, Tony, et al. Engineering. 4a ed.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.