SINGH, G. (1978). Highway engineering (for degree, diploma, and A.M.I.E.and field engineers). Standard publishers.
Lua i Stíl Chicago (17ú heag.)SINGH, Gurcharn. Highway Engineering (for Degree, Diploma, and A.M.I.E.and Field Engineers). New Delhi: Standard publishers, 1978.
Lua MLA (9ú heag.)SINGH, Gurcharn. Highway Engineering (for Degree, Diploma, and A.M.I.E.and Field Engineers). Standard publishers, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.