Facts on File, Inc, & International Union for Conservation of Nature and Natural Resources. (1994). Masterworks of man & nature (2nd ed.). Facts on File.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFacts on File, Inc, और International Union for Conservation of Nature and Natural Resources. Masterworks of Man & Nature. 2nd ed. New York: Facts on File, 1994.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFacts on File, Inc, और International Union for Conservation of Nature and Natural Resources. Masterworks of Man & Nature. 2nd ed. Facts on File, 1994.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.