Gaya APA

ASTM, . (1997). ASTM C 1240 - 97 Standard specification for silica fume for use as a mineral admixture in hydraulic cement concrete, mortar and grout . : ASTM.

Gaya MLA

ASTM, . "ASTM C 1240 - 97 Standard specification for silica fume for use as a mineral admixture in hydraulic cement concrete, mortar and grout". : ASTM, 1997. Diorama.