Gatdula, D. (2001). Big 3, two others roll back oil prices. Philippine Star.
Chicagoスタイル(17版)引用形式Gatdula, Donabelle. "Big 3, Two Others Roll Back Oil Prices." Philippine Star 2001.
MLA(9版)引用形式Gatdula, Donabelle. "Big 3, Two Others Roll Back Oil Prices." Philippine Star, 2001.
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