Gaya APA
ASTM, . (1997).
ASTM D 70 - 82. Standard test method for specific gravity and density of semi solid bituminous materials .
:
ASTM.
Gaya MLA
ASTM, .
"ASTM D 70 - 82. Standard test method for specific gravity and density of semi solid bituminous materials".
:
ASTM,
1997.
Diorama.