Não informado. (1973). ASTM Standardization News. American Society for Testing and Materials.
Chicago-referens (17:e uppl.)Não informado. ASTM Standardization News. Philadelphia, Pa: American Society for Testing and Materials, 1973.
MLA-referens (8:e uppl.)Não informado. ASTM Standardization News. American Society for Testing and Materials, 1973.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.