Gaya APA
ASTM, . (1997).
ASTM D 1863 - 93 ; ASTM D 1863 - 03 Standard specification for mineral aggregate used on built up roofs .
:
ASTM.
Gaya MLA
ASTM, .
"ASTM D 1863 - 93 ; ASTM D 1863 - 03 Standard specification for mineral aggregate used on built up roofs".
:
ASTM,
1997.
Diorama.