Dones, L. (1999). Villar is richest congressman, Cagayan's Aguinaldo poorest. Philippine Star.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDones, Liberty. "Villar Is Richest Congressman, Cagayan's Aguinaldo Poorest." Philippine Star 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDones, Liberty. "Villar Is Richest Congressman, Cagayan's Aguinaldo Poorest." Philippine Star, 1999.
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