Brown, L. R., Renner, M., & Halweil, B. (1999). Vital signs: The environmental trends that are shaping our future (3a. ed.). New York (EUA): Norton company,.
Chicago Style CitationBrown, L. R., M. Renner, and B. Halweil. Vital Signs: The Environmental Trends That Are Shaping Our Future. 3a. ed. New York (EUA): Norton company,, 1999.
MLA CitationBrown, L. R., M. Renner, and B. Halweil. Vital Signs: The Environmental Trends That Are Shaping Our Future. 3a. ed. New York (EUA): Norton company,, 1999.
Warning: These citations may not always be 100% accurate.