APA

U.S Department of transportation. Federal highway administration, . (1982). Synthesis of safety research related to traffic control and roadway elements. Vol 1-2. Washington, DC: U.S Department of transportation. Federal highway administration.

Chicago

U.S Department of transportation. Federal highway administration, . 1982. Synthesis of safety research related to traffic control and roadway elements. Vol 1-2. Washington, DC: U.S Department of transportation. Federal highway administration.

Harvard

U.S Department of transportation. Federal highway administration, . (1982). Synthesis of safety research related to traffic control and roadway elements. Vol 1-2. Washington, DC: U.S Department of transportation. Federal highway administration.

MLA

U.S Department of transportation. Federal highway administration, . Synthesis of safety research related to traffic control and roadway elements. Vol 1-2. Washington, DC: U.S Department of transportation. Federal highway administration. 1982.