APA

U.S. Department of Transportation, Federal Highway Administration & National Highway Traffic Safety Administration. (1990). Effective highway accident countermeasures. Symposium, June 12-14, 1990. Proceedings. Washington DC: U.S. Department of Transportation.

Chicago

U.S. Department of Transportation, Federal Highway Administration and National Highway Traffic Safety Administration. 1990. Effective highway accident countermeasures. Symposium, June 12-14, 1990. Proceedings. Washington DC: U.S. Department of Transportation.

Harvard

U.S. Department of Transportation, Federal Highway Administration and National Highway Traffic Safety Administration. (1990). Effective highway accident countermeasures. Symposium, June 12-14, 1990. Proceedings. Washington DC: U.S. Department of Transportation.

MLA

U.S. Department of Transportation, Federal Highway Administration and National Highway Traffic Safety Administration. Effective highway accident countermeasures. Symposium, June 12-14, 1990. Proceedings. Washington DC: U.S. Department of Transportation. 1990.