Olchondra, R. T. First Gen posts drop in income on lukewarm hydro, geo power sales. Philippine Daily Inquirer.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOlchondra, Riza T. "First Gen Posts Drop in Income on Lukewarm Hydro, Geo Power Sales." Philippine Daily Inquirer .
एमएलए (9वां संस्करण) प्रशस्ति पत्रOlchondra, Riza T. "First Gen Posts Drop in Income on Lukewarm Hydro, Geo Power Sales." Philippine Daily Inquirer, .
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