Grafilo, J. (2001). Manila garbage woes ease as Filipinos learn to recycle. Manila Bulletin.
Chicago-viite (17. p.)Grafilo, John. "Manila Garbage Woes Ease as Filipinos Learn to Recycle." Manila Bulletin 2001.
MLA-viite (9. p.)Grafilo, John. "Manila Garbage Woes Ease as Filipinos Learn to Recycle." Manila Bulletin, 2001.
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