Eckholm, E. P. (1977). The picture of health: Environmental sources of disease (First edition.). Norton.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEckholm, Erik P. The Picture of Health: Environmental Sources of Disease. First edition. New York: Norton, 1977.
एमएलए (8वां संस्करण) प्रशस्ति पत्रEckholm, Erik P. The Picture of Health: Environmental Sources of Disease. First edition. Norton, 1977.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.