De Vera-Ruiz, E. DENR gives trash-collecting boats to clean Manila Bay. IN National News. Manila Bulletin.
芝加哥风格引文De Vera-Ruiz, Ellalyn. "DENR Gives Trash-collecting Boats to Clean Manila Bay. IN National News." Manila Bulletin .
MLA引文De Vera-Ruiz, Ellalyn. "DENR Gives Trash-collecting Boats to Clean Manila Bay. IN National News." Manila Bulletin, .
警告：这些引文格式不一定是100％准确.