American Association of State Highway and Transportation Officials. (2010). Standard specifications for transportation materials and methods of sampling and testing (30th ed.). American Association of State Highway and Transportation Officials.
Cita Chicago Style (17a ed.)American Association of State Highway and Transportation Officials. Standard Specifications for Transportation Materials and Methods of Sampling and Testing. 30th ed. Washington, DC: American Association of State Highway and Transportation Officials, 2010.
Cita MLA (8a ed.)American Association of State Highway and Transportation Officials. Standard Specifications for Transportation Materials and Methods of Sampling and Testing. 30th ed. American Association of State Highway and Transportation Officials, 2010.