Gaya APA
ASTM, .
(1997).
ASTM C 900 - 94 Standard test method for pollut strength of hardened concrete
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:
ASTM.
Gaya MLA
ASTM, .
"ASTM C 900 - 94 Standard test method for pollut strength of hardened concrete".
:
ASTM,
1997.
Diorama.