Brown, L. R., Renner, M., Starke, L., & Halweil, B. (2000). Vital signs 2000: The environmental trends that are shaping our future. Norton.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBrown, Lester Russell, Michael Renner, Linda Starke, और Brian Halweil. Vital Signs 2000: The Environmental Trends That Are Shaping Our Future. New York: Norton, 2000.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBrown, Lester Russell, et al. Vital Signs 2000: The Environmental Trends That Are Shaping Our Future. Norton, 2000.
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