Dyfyniad APA
American Society for Testing and Materials. Committee C-9 on Concrete and Concrete Aggregates. (1978). Significance of tests and properties of concrete and concrete-making materials. ASTM.
Dyfyniad Arddull Chicago
American Society for Testing and Materials. Committee C-9 on Concrete and Concrete Aggregates. Significance of Tests and Properties of Concrete and Concrete-making Materials. Philadelphia: ASTM, 1978.
Dyfyniad MLA
American Society for Testing and Materials. Committee C-9 on Concrete and Concrete Aggregates. Significance of Tests and Properties of Concrete and Concrete-making Materials. ASTM, 1978.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.