Estupigan, R. (1999). Putting premium on quality tertiary education. Manila Bulletin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEstupigan, Ruth. "Putting Premium on Quality Tertiary Education." Manila Bulletin 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रEstupigan, Ruth. "Putting Premium on Quality Tertiary Education." Manila Bulletin, 1999.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.