Brown, L. R., Lenssen, N. K., Kane, H., & Starke, L. (1995). Vital signs: The trends that are shaping our future, 1995. W.W. Norton & company.
Lua i Stíl Chicago (17ú heag.)Brown, Lester Russell, Nicholas K. Lenssen, Hal Kane, agus Linda Starke. Vital Signs: The Trends That Are Shaping Our Future, 1995. London: W.W. Norton & company, 1995.
Lua MLA (8ú heag.)Brown, Lester Russell, et al. Vital Signs: The Trends That Are Shaping Our Future, 1995. W.W. Norton & company, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.