Não informado. (1974). American Highway and Transportation Magazine. American Association of State Highway and Transportation Officials.
Cita Chicago Style (17a ed.)Não informado. American Highway and Transportation Magazine. Washington: American Association of State Highway and Transportation Officials, 1974.
Cita MLA (8a ed.)Não informado. American Highway and Transportation Magazine. American Association of State Highway and Transportation Officials, 1974.
Precaución: Estas citas no son 100% exactas.