Gaya APA

AASHTO, . (2008). AASHTO M 170-08 , ASTM C 76-07 Standard Specification for Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe . : AASHTO.

Gaya MLA

AASHTO, . "AASHTO M 170-08 , ASTM C 76-07 Standard Specification for Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe". : AASHTO, 2008. Diorama.