APA

United States. Federal Highway Administration, . (1971). Manual on uniform traffic control devices for streets and highways. Washington: .

Chicago

United States. Federal Highway Administration, . 1971. Manual on uniform traffic control devices for streets and highways. Washington: .

Harvard

United States. Federal Highway Administration, . (1971). Manual on uniform traffic control devices for streets and highways. Washington: .

MLA

United States. Federal Highway Administration, . Manual on uniform traffic control devices for streets and highways. Washington: . 1971.