(2005). 99 metallurgists, mining engineers, geologists pass exams. Manila Bulletin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"99 Metallurgists, Mining Engineers, Geologists Pass Exams." Manila Bulletin 2005.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"99 Metallurgists, Mining Engineers, Geologists Pass Exams." Manila Bulletin, 2005.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.