Cita APA (7a ed.)
Brown, L. R., Renner, M., Halweil, B., Abramovitz, J. N., & Starke, L. (1999). Vital Signs 1999: The Environmental Trends that Are Shaping Our Future. Norton.
Cita estilo Chicago (17a ed.)
Brown, Lester R., Michael Renner, Brian Halweil, Janet N. Abramovitz, y Linda Starke. Vital Signs 1999: The Environmental Trends That Are Shaping Our Future. Nueva York, EUA: Norton, 1999.
Cita MLA (9a ed.)
Brown, Lester R., et al. Vital Signs 1999: The Environmental Trends That Are Shaping Our Future. Norton, 1999.
Precaución: Estas citas no son 100% exactas.