APA (7th ed.) Citation

American Association of State Highway and Transportation Officials & Knovel (Firm). (2021). Standard specifications for transportation materials and methods of sampling and testing: And AASHTO provisional standards (Forty first edition.). American Association of State Highway and Transportation Officials (AASHTO).

Chicago Style (17th ed.) Citation

American Association of State Highway and Transportation Officials and Knovel (Firm). Standard Specifications for Transportation Materials and Methods of Sampling and Testing: And AASHTO Provisional Standards. Forty first edition. Washington, DC: American Association of State Highway and Transportation Officials (AASHTO), 2021.

MLA (9th ed.) Citation

American Association of State Highway and Transportation Officials and Knovel (Firm). Standard Specifications for Transportation Materials and Methods of Sampling and Testing: And AASHTO Provisional Standards. Forty first edition. American Association of State Highway and Transportation Officials (AASHTO), 2021.