Nuyda, D. G. (1999). A National policy for sustainable mining. IN Seeing green [column]. Philippine Daily Inquirer.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNuyda, Doris G. "A National Policy for Sustainable Mining. IN Seeing Green [column]." Philippine Daily Inquirer 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNuyda, Doris G. "A National Policy for Sustainable Mining. IN Seeing Green [column]." Philippine Daily Inquirer, 1999.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.