American Association of State Highway and Transportation Officials, & American Association of State Highway and Transportation Officials. (2007). Standard specifications for transportation materials and methods of sampling and testing (27. edition.). Washington, D.C.: American Association of State Highway and Transportation Officials.
Citación estilo ChicagoAmerican Association of State Highway and Transportation Officials, y American Association of State Highway and Transportation Officials. Standard Specifications for Transportation Materials and Methods of Sampling and Testing. 27. edition. Washington, D.C.: American Association of State Highway and Transportation Officials, 2007.
Cita MLAAmerican Association of State Highway and Transportation Officials, y American Association of State Highway and Transportation Officials. Standard Specifications for Transportation Materials and Methods of Sampling and Testing. 27. edition. Washington, D.C.: American Association of State Highway and Transportation Officials, 2007.