APA
American Association of State Highway and Transportation Officials, .Standard Specifications for Transportation Materials and Methods of Sampling and Testing, Part 1A Specifications. Washington: American Association of State Highway and Transportation Officials,2015: .
Chicago
American Association of State Highway and Transportation Officials, .Standard Specifications for Transportation Materials and Methods of Sampling and Testing, Part 1A Specifications. Washington: American Association of State Highway and Transportation Officials,2015: .
Harvard
American Association of State Highway and Transportation Officials, .Standard Specifications for Transportation Materials and Methods of Sampling and Testing, Part 1A Specifications. Washington: American Association of State Highway and Transportation Officials,2015: .
MLA
American Association of State Highway and Transportation Officials, .Washington: American Association of State Highway and Transportation Officials,2015: . .