Gaya APA
ASTM, . (1997).
ASTM C 1117 - 89 Standard test method for time of setting of shotcrete mixtures by penetration resistance .
:
ASTM.
Gaya MLA
ASTM, .
"ASTM C 1117 - 89 Standard test method for time of setting of shotcrete mixtures by penetration resistance".
:
ASTM,
1997.
Diorama.