HEWES, L. I., & HEWES, L. I. (1977). Highway Engineering By Laurence I. Hewes And Clarkson H. Oglesby. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)HEWES, Laurence I., agus Laurence I. HEWES. Highway Engineering By Laurence I. Hewes And Clarkson H. Oglesby. John Wiley & Sons, 1977.
Lua MLA (8ú heag.)HEWES, Laurence I., agus Laurence I. HEWES. Highway Engineering By Laurence I. Hewes And Clarkson H. Oglesby. John Wiley & Sons, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.