Region 1, Ilocos Region: Road network and infrastracture system. s.n.
Chicago Style (17th ed.) CitationRegion 1, Ilocos Region: Road Network and Infrastracture System. [S.l: s.n.
MLA (9th ed.) CitationRegion 1, Ilocos Region: Road Network and Infrastracture System. s.n.
Warning: These citations may not always be 100% accurate.