Custodio, R. (2000). Laguna de Bay polluted ; loses potential as source of tap water. Manila Times.
Chicago Style (17. basım) AtıfCustodio, Rene. "Laguna De Bay Polluted ; Loses Potential as Source of Tap Water." Manila Times 2000.
MLA (9th ed.) AtıfCustodio, Rene. "Laguna De Bay Polluted ; Loses Potential as Source of Tap Water." Manila Times, 2000.
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