Frialde, M. (2015). MMDA wants quake drills institutionalized. Philippine Star.
Lua i Stíl Chicago (17ú heag.)Frialde, Mike. "MMDA Wants Quake Drills Institutionalized." Philippine Star 2015.
Lua MLA (9ú heag.)Frialde, Mike. "MMDA Wants Quake Drills Institutionalized." Philippine Star, 2015.
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