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