NARBON, J. D. (1996). Bridge And Structure Estimating J. David Nardon. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)NARBON, J. David. Bridge And Structure Estimating J. David Nardon. McGraw-Hill, 1996.
Lua MLA (8ú heag.)NARBON, J. David. Bridge And Structure Estimating J. David Nardon. McGraw-Hill, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.