Sigua, R. G. (2008). Fundamentals of traffic engineering. The University of the Philippines Press.
Chicago Style aipamenaSigua, Ricardo G. Fundamentals of Traffic Engineering. Diliman, Quezon City: The University of the Philippines Press, 2008.
MLA aipamenaSigua, Ricardo G. Fundamentals of Traffic Engineering. The University of the Philippines Press, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.