Petroski, H. (2012). To forgive design: Understanding failure. Belknap Press of Harvard University Press.
Lua i Stíl Chicago (17ú heag.)Petroski, Henry. To Forgive Design: Understanding Failure. Cambridge, Mass.: Belknap Press of Harvard University Press, 2012.
Lua MLA (9ú heag.)Petroski, Henry. To Forgive Design: Understanding Failure. Belknap Press of Harvard University Press, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.