Cita APA (7th ed.)

Cunard, R. A. (1990). Maintenance management of street and highway signs. Transportation Research Board, National Research Council.

Cita Chicago (17th ed.)

Cunard, Richard A. Maintenance Management of Street and Highway Signs. Washington, D.C: Transportation Research Board, National Research Council, 1990.

Cita MLA (9th ed.)

Cunard, Richard A. Maintenance Management of Street and Highway Signs. Transportation Research Board, National Research Council, 1990.