Dyfyniad APA

American Society for Testing and Materials. (1971). 1971 annual book of ASTM standards. American Society for Testing and Materials.

Dyfyniad Arddull Chicago

American Society for Testing and Materials. 1971 Annual Book of ASTM Standards. Philadelphia: American Society for Testing and Materials, 1971.

Dyfyniad MLA

American Society for Testing and Materials. 1971 Annual Book of ASTM Standards. American Society for Testing and Materials, 1971.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.