(1998). Report card for America's infrastructure. American Society of Civil Engineers. https://doi.org/10.1061/9780784478899
Chicago Style aipamenaReport Card for America's Infrastructure. Reston, Virginia: American Society of Civil Engineers, 1998. https://doi.org/10.1061/9780784478899.
MLA aipamenaReport Card for America's Infrastructure. American Society of Civil Engineers, 1998. https://doi.org/10.1061/9780784478899.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.