Philippines. National Statistics Office. (1988). Philippine energy statistics. The Office.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPhilippines. National Statistics Office. Philippine Energy Statistics. Manila: The Office, 1988.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPhilippines. National Statistics Office. Philippine Energy Statistics. The Office, 1988.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.