Domingo, R. W. Petron returns to black on improved oil prices, market sentiment. Philippine Daily Inquirer.
Chicago-viite (17. p.)Domingo, Ronnel W. "Petron Returns to Black on Improved Oil Prices, Market Sentiment." Philippine Daily Inquirer .
MLA-viite (9. p.)Domingo, Ronnel W. "Petron Returns to Black on Improved Oil Prices, Market Sentiment." Philippine Daily Inquirer, .
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