APA

U.S. Department of Transportation, . (1988). Manual on uniform traffic control devices: for streets and highways. Washington, D.C: U.S., Department of Transportation. Federal Highway Administration.

Chicago

U.S. Department of Transportation, . 1988. Manual on uniform traffic control devices: for streets and highways. Washington, D.C: U.S., Department of Transportation. Federal Highway Administration.

Harvard

U.S. Department of Transportation, . (1988). Manual on uniform traffic control devices: for streets and highways. Washington, D.C: U.S., Department of Transportation. Federal Highway Administration.

MLA

U.S. Department of Transportation, . Manual on uniform traffic control devices: for streets and highways. Washington, D.C: U.S., Department of Transportation. Federal Highway Administration. 1988.