Gaya APA
ASTM, . (1997).
ASTM D 449 - 89; D 449 - 03 Standard specification for asphalt used in dampproofing and waterproofing .
:
ASTM.
Gaya MLA
ASTM, .
"ASTM D 449 - 89; D 449 - 03 Standard specification for asphalt used in dampproofing and waterproofing".
:
ASTM,
1997.
Diorama.