Silver, C. S., & DeFries, R. S. (1991). One earth one future: Our changing global environment. East-West Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSilver, Cheryl Simon, और Ruth S.;Silver DeFries. One Earth One Future: Our Changing Global Environment. East-West Press, 1991.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSilver, Cheryl Simon, और Ruth S.;Silver DeFries. One Earth One Future: Our Changing Global Environment. East-West Press, 1991.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.