(1997). Further upgrade in RP rating seen. IN Perspective [column]. Philippine Daily Inquirer.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"Further Upgrade in RP Rating Seen. IN Perspective [column]." Philippine Daily Inquirer 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"Further Upgrade in RP Rating Seen. IN Perspective [column]." Philippine Daily Inquirer, 1997.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.