ENGINEERS, I. O. T. (1993). The Traffic Safety Toolbox: A primer on traffic safety. Institute of Transportation Engineers.
Lua i Stíl Chicago (17ú heag.)ENGINEERS, INSTITUTE OF TRANSPORTATION. The Traffic Safety Toolbox: A Primer on Traffic Safety. Institute of Transportation Engineers, 1993.
Lua MLA (8ú heag.)ENGINEERS, INSTITUTE OF TRANSPORTATION. The Traffic Safety Toolbox: A Primer on Traffic Safety. Institute of Transportation Engineers, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.