Villanueva, M. A. Green power vs carbon. IN Opinion. The Philippine Star.
Chicagoスタイル(17版)引用形式Villanueva, Marichu A. "Green Power Vs Carbon. IN Opinion." The Philippine Star .
MLA(9版)引用形式Villanueva, Marichu A. "Green Power Vs Carbon. IN Opinion." The Philippine Star, .
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