Petroski, H. (2012). To forgive design: Understanding failure. Belknap Press of Harvard University Press.
Chicago-čujuhus (17. p.)Petroski, Henry. To Forgive Design: Understanding Failure. Cambridge, Mass.: Belknap Press of Harvard University Press, 2012.
MLA-čujuhus (9. p.)Petroski, Henry. To Forgive Design: Understanding Failure. Belknap Press of Harvard University Press, 2012.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.