Cita APA

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.

Citación estilo Chicago

National Highway Institute (Estados Unidos), National Highway Institute (Estados Unidos), Federal Highway Administration (Estados Unidos). Department of Transportation, y Federal Highway Administration (Estados Unidos). Department of Transportation. Principles of Writing Highway Construction Specifications. [Lugar de publicación no identificado]: National Highway Institute, 2003.

Cita MLA

National Highway Institute (Estados Unidos), National Highway Institute (Estados Unidos), Federal Highway Administration (Estados Unidos). Department of Transportation, y Federal Highway Administration (Estados Unidos). Department of Transportation. Principles of Writing Highway Construction Specifications. [Lugar de publicación no identificado]: National Highway Institute, 2003.