Gaya APA
ASTM, . (2008).
AASHTO M 268-08; ASTM D 4956-07 Standard specification for retroreflective sheeting for traffic control (28th).
:
AASHTO.
Gaya MLA
ASTM, .
"AASHTO M 268-08; ASTM D 4956-07 Standard specification for retroreflective sheeting for traffic control".
28th
:
AASHTO,
2008.
Diorama.