Gaya APA
ASTM, . (1997).
ASTM D 2822 - 91; ASTM D 2822 - 91 (Reapproved 1997) Standard specification for asphalt roof cement .
:
ASTM.
Gaya MLA
ASTM, .
"ASTM D 2822 - 91; ASTM D 2822 - 91 (Reapproved 1997) Standard specification for asphalt roof cement".
:
ASTM,
1997.
Diorama.