Velasco, M. M. (2007). Chemrez Tech: Tugging its way as a pioneer in RP's biofuels industry. Manila Bulletin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVelasco, Myrna M. "Chemrez Tech: Tugging Its Way as a Pioneer in RP's Biofuels Industry." Manila Bulletin 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVelasco, Myrna M. "Chemrez Tech: Tugging Its Way as a Pioneer in RP's Biofuels Industry." Manila Bulletin, 2007.
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