National Highway Institute (Estados Unidos), National Highway Institute (Estados Unidos), Federal Highway Administration (Estados Unidos). Department of Transportation, & Federal Highway Administration (Estados Unidos). Department of Transportation. (2003). Principles of writing highway construction specifications. [Lugar de publicación no identificado]: National Highway Institute.
Chicago Style CitationNational Highway Institute (Estados Unidos), National Highway Institute (Estados Unidos), Federal Highway Administration (Estados Unidos). Department of Transportation, and Federal Highway Administration (Estados Unidos). Department of Transportation. Principles of Writing Highway Construction Specifications. [Lugar de publicación no identificado]: National Highway Institute, 2003.
MLA CitationNational Highway Institute (Estados Unidos), National Highway Institute (Estados Unidos), Federal Highway Administration (Estados Unidos). Department of Transportation, and Federal Highway Administration (Estados Unidos). Department of Transportation. Principles of Writing Highway Construction Specifications. [Lugar de publicación no identificado]: National Highway Institute, 2003.