KHANNA, S. J. (2009). Highway materials and pavement testing. New Chand.
Lua i Stíl Chicago (17ú heag.)KHANNA, S.K. Justo. Highway Materials and Pavement Testing. New Chand, 2009.
Lua MLA (9ú heag.)KHANNA, S.K. Justo. Highway Materials and Pavement Testing. New Chand, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.