Gaya APA
AASHTO, . (2008).
AASHTO T 280 - 06; ASTM C 497 - 05 Standard method of test for concrete pipe, manhole sections or tile (28th).
:
AASHTO.
Gaya MLA
AASHTO, .
"AASHTO T 280 - 06; ASTM C 497 - 05 Standard method of test for concrete pipe, manhole sections or tile".
28th
:
AASHTO,
2008.
Diorama.