Citazione Stile APA (7a Edizione)

U.S. Departament of Transportation. (1980). Safety design and operational practices for streets and highways. U.S. Departament of Transportation.

Citazione stile Chigago Style (17a edizione)

U.S. Departament of Transportation. Safety Design and Operational Practices for Streets and Highways. Washington, D.C: U.S. Departament of Transportation, 1980.

Citatione MLA (9a ed.)

U.S. Departament of Transportation. Safety Design and Operational Practices for Streets and Highways. U.S. Departament of Transportation, 1980.