Gaya APA
DOUGLAS, R, A. (2016).
REFERENSI : LOW VOLUME ROAD ENGINEERING DESIGN, CONSTRUCTION AND MAINTENANCE .
PRANCIS:
CRC PRESS.
Gaya MLA
DOUGLAS, ROBERT, A..
"REFERENSI : LOW VOLUME ROAD ENGINEERING DESIGN, CONSTRUCTION AND MAINTENANCE".
PRANCIS:
CRC PRESS,
2016.
Text.