Gaya APA
AASHTO, . (2004).
AASHTO M 206M-04 , ASTM C 506M-02 Reinforced Concrete Arch Culvert, Storm Drain, and Sewer Pipe (Metric) .
:
s.n..
Gaya MLA
AASHTO, .
"AASHTO M 206M-04 , ASTM C 506M-02 Reinforced Concrete Arch Culvert, Storm Drain, and Sewer Pipe (Metric)".
:
s.n.,
2004.
Diorama.