United States. Federal Highway Administration. (1968). Handbook of highway safety design and operating practices. Federal Highway Administration.
Chicago Style (17th ed.) CitationUnited States. Federal Highway Administration. Handbook of Highway Safety Design and Operating Practices. Washington, D.C.: Federal Highway Administration, 1968.
MLA (9th ed.) CitationUnited States. Federal Highway Administration. Handbook of Highway Safety Design and Operating Practices. Federal Highway Administration, 1968.
Warning: These citations may not always be 100% accurate.