Locsin, J. (1997). Only 10 percent of RP roads are paved, according to UP study. Philippine Star.
Chicago-referens (17:e uppl.)Locsin, Joel. "Only 10 Percent of RP Roads Are Paved, According to UP Study." Philippine Star 1997.
MLA-referens (9:e uppl.)Locsin, Joel. "Only 10 Percent of RP Roads Are Paved, According to UP Study." Philippine Star, 1997.
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