Não informado. (1970). Annual book of ASTM standards. American Society for Testing and Materials.
Citação do estilo Chicago (17ª ed.)Não informado. Annual Book of ASTM Standards. Philadelphia, Pa: American Society for Testing and Materials, 1970.
Citação MLA (8ª ed.)Não informado. Annual Book of ASTM Standards. American Society for Testing and Materials, 1970.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.