Bilowan, C. (2001). Customs sets better service to port users. Manila Times.
Chicago Style aipamenaBilowan, Cesar. "Customs Sets Better Service to Port Users." Manila Times 2001.
MLA aipamenaBilowan, Cesar. "Customs Sets Better Service to Port Users." Manila Times, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.