Villanueva, R. (2012). Critical habitat for Phl duck declared in Isabela. Philippine Star.
Chicagoスタイル(17版)引用形式Villanueva, Rhodina. "Critical Habitat for Phl Duck Declared in Isabela." Philippine Star 2012.
MLA(9版)引用形式Villanueva, Rhodina. "Critical Habitat for Phl Duck Declared in Isabela." Philippine Star, 2012.
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