United States. Federal Highway Administration & Turner-Fairbank Highway Research Center. (2007). Strengthening historic covered bridges to carry modern traffic. Federal Highway Administration.
Chicago Style (17th ed.) CitationUnited States. Federal Highway Administration and Turner-Fairbank Highway Research Center. Strengthening Historic Covered Bridges to Carry Modern Traffic. McLean, Va.: Federal Highway Administration, 2007.
MLA (9th ed.) CitationUnited States. Federal Highway Administration and Turner-Fairbank Highway Research Center. Strengthening Historic Covered Bridges to Carry Modern Traffic. Federal Highway Administration, 2007.
Warning: These citations may not always be 100% accurate.