Gaya APA
ASTM, . (1997).
ASTM D 3018 - 90 Standard specification for class A asphalt shingles surfaced with mineral granules .
:
ASTM.
Gaya MLA
ASTM, .
"ASTM D 3018 - 90 Standard specification for class A asphalt shingles surfaced with mineral granules".
:
ASTM,
1997.
Diorama.