APA

U.S. Department of Transportation. Federal Highway Administration, . (2006). Ramp management and control. Washington DC: U.S. Department of Transportation. Federal Highway Administration.

Chicago

U.S. Department of Transportation. Federal Highway Administration, . 2006. Ramp management and control. Washington DC: U.S. Department of Transportation. Federal Highway Administration.

Harvard

U.S. Department of Transportation. Federal Highway Administration, . (2006). Ramp management and control. Washington DC: U.S. Department of Transportation. Federal Highway Administration.

MLA

U.S. Department of Transportation. Federal Highway Administration, . Ramp management and control. Washington DC: U.S. Department of Transportation. Federal Highway Administration. 2006.