MLA

Brown, Lester R, et al. Vital Signs : the Trends That Are Shaping Our Future : 1992-1993. Washington D.C: Worldwatch Institute, 1992.

APA

Brown, L. R, Flavin, C., Kane, H., & Starke, L. (1992). Vital signs : the trends that are shaping our future : 1992-1993. Washington D.C: Worldwatch Institute.

Chicago

Brown, Lester R., Christopher Flavin, Hal Kane, and Linda Starke. Vital Signs: The Trends That Are Shaping Our Future : 1992-1993. Washington D.C: Worldwatch Institute, 1992.