Gaya APA
ASTM, . (1997).
ASTM D 4811 -90 Standard specification for nonvulcanized rubber sheet used as roof flashing .
:
ASTM.
Gaya MLA
ASTM, .
"ASTM D 4811 -90 Standard specification for nonvulcanized rubber sheet used as roof flashing".
:
ASTM,
1997.
Diorama.