De Vera-Ruiz, E. DENR gives trash-collecting boats to clean Manila Bay. IN National News. Manila Bulletin.
Chicago-referens (17:e uppl.)De Vera-Ruiz, Ellalyn. "DENR Gives Trash-collecting Boats to Clean Manila Bay. IN National News." Manila Bulletin .
MLA-referens (9:e uppl.)De Vera-Ruiz, Ellalyn. "DENR Gives Trash-collecting Boats to Clean Manila Bay. IN National News." Manila Bulletin, .
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.