American Association of State Highway and Transportation Officials & American Association of State Highway and Transportation Officials. (2017). Standard specifications for transportation materials and methods of sampling and testing and AASHTO provisional standards (2017 edition.). American Association of State Highway and Transportation Officials.
Cita Chicago Style (17a ed.)American 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 and AASHTO Provisional Standards. 2017 edition. Washington, DC: American Association of State Highway and Transportation Officials, 2017.
Cita MLA (8a ed.)American 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 and AASHTO Provisional Standards. 2017 edition. American Association of State Highway and Transportation Officials, 2017.