Não informado. (1974). American Highway and Transportation Monthly. American Association of State Highway and Transportation Officials.
Chicago-Zitierstil (17. Ausg.)Não informado. American Highway and Transportation Monthly. Washington: American Association of State Highway and Transportation Officials, 1974.
MLA-Zitierstil (8. Ausg.)Não informado. American Highway and Transportation Monthly. American Association of State Highway and Transportation Officials, 1974.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.