Velasco, M. M. Malampaya gas proceeds climb to US dollar 22.493 billion in 2017. IN Business News. Manila Bulletin.
芝加哥风格引文Velasco, Myrna M. "Malampaya Gas Proceeds Climb to US Dollar 22.493 Billion in 2017. IN Business News." Manila Bulletin .
MLA引文Velasco, Myrna M. "Malampaya Gas Proceeds Climb to US Dollar 22.493 Billion in 2017. IN Business News." Manila Bulletin, .
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