(1998). Buhay awards for greenhouse gases abatement. Manila Bulletin.
Chicago Style aipamena"Buhay Awards for Greenhouse Gases Abatement." Manila Bulletin 1998.
MLA aipamena"Buhay Awards for Greenhouse Gases Abatement." Manila Bulletin, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.