Grafilo, J. (2001). Manila garbage woes ease as Filipinos learn to recycle. Manila Bulletin.
Lua i Stíl Chicago (17ú heag.)Grafilo, John. "Manila Garbage Woes Ease as Filipinos Learn to Recycle." Manila Bulletin 2001.
Lua MLA (9ú heag.)Grafilo, John. "Manila Garbage Woes Ease as Filipinos Learn to Recycle." Manila Bulletin, 2001.
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