Lillard, R. G. (1966). Eden in jeopardy: Man's prodigal meddling with his environment. Knopf.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLillard, Richard Gordon. Eden in Jeopardy: Man's Prodigal Meddling with His Environment. New York: Knopf, 1966.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLillard, Richard Gordon. Eden in Jeopardy: Man's Prodigal Meddling with His Environment. Knopf, 1966.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.