Não informado. (1974). American Highway and Transportation Magazine. American Association of State Highway and Transportation Officials.
Citação do estilo Chicago (17ª ed.)Não informado. American Highway and Transportation Magazine. Washington: American Association of State Highway and Transportation Officials, 1974.
Citação MLA (8ª ed.)Não informado. American Highway and Transportation Magazine. American Association of State Highway and Transportation Officials, 1974.
警告：这些引文格式不一定是100％准确.