American Association of State Highway and Transportation Officials, & American Association of State Highway and Transportation Officials. (1950). Standard specifications for highway materials and methods of sampling and testing (6. edition.). Washington: National Press Building.
Citación estilo ChicagoAmerican Association of State Highway and Transportation Officials, y American Association of State Highway and Transportation Officials. Standard Specifications for Highway Materials and Methods of Sampling and Testing. 6. edition. Washington: National Press Building, 1950.
Cita MLAAmerican Association of State Highway and Transportation Officials, y American Association of State Highway and Transportation Officials. Standard Specifications for Highway Materials and Methods of Sampling and Testing. 6. edition. Washington: National Press Building, 1950.