Thiel, D. V. (2014). Research methods for engineers (First edition.). Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Thiel, David V. Research Methods for Engineers. First edition. Reino Unido: Cambridge University Press, 2014.
Lua MLA (8ú heag.)Thiel, David V. Research Methods for Engineers. First edition. Cambridge University Press, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.