Unite, B. Villar sacks DPWH engineer over ₱20-M extortion attempt. IN News. Manila Bulletin.
芝加哥风格引文Unite, Betheena. "Villar Sacks DPWH Engineer over ₱20-M Extortion Attempt. IN News." Manila Bulletin .
MLA引文Unite, Betheena. "Villar Sacks DPWH Engineer over ₱20-M Extortion Attempt. IN News." Manila Bulletin, .
警告：这些引文格式不一定是100％准确.