GUPTA, B. G. (2014). Highway and bridge engineering. Standard Publishers.
Lua i Stíl Chicago (17ú heag.)GUPTA, B.L. Gupta. Highway and Bridge Engineering. Standard Publishers, 2014.
Lua MLA (9ú heag.)GUPTA, B.L. Gupta. Highway and Bridge Engineering. Standard Publishers, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.