Ocampo, Y. D. Davao river to be filtered with water plants. IN Environment News. Manila Bulletin.
Chicagoスタイル(17版)引用形式Ocampo, Yas D. "Davao River to Be Filtered with Water Plants. IN Environment News." Manila Bulletin .
MLA(9版)引用形式Ocampo, Yas D. "Davao River to Be Filtered with Water Plants. IN Environment News." Manila Bulletin, .
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