Custodio, R. (2000). Laguna de Bay polluted ; loses potential as source of tap water. Manila Times.
Dyfyniad Arddull ChicagoCustodio, Rene. "Laguna De Bay Polluted ; Loses Potential as Source of Tap Water." Manila Times 2000.
Dyfyniad MLACustodio, Rene. "Laguna De Bay Polluted ; Loses Potential as Source of Tap Water." Manila Times, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.