Wright, P. H., & Paquette, R. J. (1987). Highway engineering (4th ed.). John Wiley.
Lua i Stíl Chicago (17ú heag.)Wright, Paul H., agus Radnor J. Paquette. Highway Engineering. 4th ed. New York: John Wiley, 1987.
Lua MLA (9ú heag.)Wright, Paul H., agus Radnor J. Paquette. Highway Engineering. 4th ed. John Wiley, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.