Brown, L. R., Renner, M., Starke, L., & Halweil, B. (2000). Vital signs 2000: The environmental trends that are shaping our future. Norton.
Lua i Stíl Chicago (17ú heag.)Brown, Lester Russell, Michael Renner, Linda Starke, agus Brian Halweil. Vital Signs 2000: The Environmental Trends That Are Shaping Our Future. New York: Norton, 2000.
Lua MLA (8ú heag.)Brown, Lester Russell, et al. Vital Signs 2000: The Environmental Trends That Are Shaping Our Future. Norton, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.