Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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

Atenció: Aquestes cites poden no estar 100% correctes.