Gaya APA
AASHTO, . (2004).
AASHTO M 178-95 (2003) , ASTM C 412-99 Standard Specification for Concrete Drain Tile .
:
s.n..
Gaya MLA
AASHTO, .
"AASHTO M 178-95 (2003) , ASTM C 412-99 Standard Specification for Concrete Drain Tile".
:
s.n.,
2004.
Diorama.