HOBBS, F. D. (1974). Traffic planning and engineering. Pergamon Press.
Lua i Stíl Chicago (17ú heag.)HOBBS, F. D. Traffic Planning and Engineering. Oxfor: Pergamon Press, 1974.
Lua MLA (8ú heag.)HOBBS, F. D. Traffic Planning and Engineering. Pergamon Press, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.