Dyfyniad APA
American Association of State Highway and Transportation Officials. (2002). Standard specifications for transportation materials and methods of sampling and testing (22nd ed.). American Association of State Highway and Transportation Officials.
Dyfyniad Arddull Chicago
American Association of State Highway and Transportation Officials. Standard Specifications for Transportation Materials and Methods of Sampling and Testing. 22nd ed. Washington: American Association of State Highway and Transportation Officials, 2002.
Dyfyniad MLA
American Association of State Highway and Transportation Officials. Standard Specifications for Transportation Materials and Methods of Sampling and Testing. 22nd ed. American Association of State Highway and Transportation Officials, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.