United States. Federal Highway Administration. (1977). Esthetics and visual resource management for highways. s.n..
芝加哥风格引文United States. Federal Highway Administration. Esthetics and Visual Resource Management for Highways. [United States: s.n., 1977.
MLA引文United States. Federal Highway Administration. Esthetics and Visual Resource Management for Highways. s.n., 1977.
警告：这些引文格式不一定是100％准确.