Sigua, R. G. (2008). Fundamentals of traffic engineering. University of the Philippines Press.
Čikaški stil citiranja (17. izdanje)Sigua, Ricardo G. Fundamentals of Traffic Engineering. Quezon City: University of the Philippines Press, 2008.
MLA način citiranja (9. izdanje)Sigua, Ricardo G. Fundamentals of Traffic Engineering. University of the Philippines Press, 2008.
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