APA-referens (7:e uppl.)

United States. Federal Highway Administration. (1977). Esthetics and visual resource management for highways. s.n..

Chicago-referens (17:e uppl.)

United States. Federal Highway Administration. Esthetics and Visual Resource Management for Highways. [United States: s.n., 1977.

MLA-referens (8:e uppl.)

United States. Federal Highway Administration. Esthetics and Visual Resource Management for Highways. s.n., 1977.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.