Cita APA (7a ed.)
Halweil, B., Mastny, L., & Starke, L. State of the World 2004: A Worldwatch Institute Report on Progress Toward a Sustainable Society. Norton : Worldwatch Institute.
Cita estilo Chicago (17a ed.)
Halweil, Brian, Lisa Mastny, y Linda Starke. State of the World 2004: A Worldwatch Institute Report on Progress Toward a Sustainable Society. Nueva York, EUA: Norton : Worldwatch Institute.
Cita MLA (9a ed.)
Halweil, Brian, et al. State of the World 2004: A Worldwatch Institute Report on Progress Toward a Sustainable Society. Norton : Worldwatch Institute.
Precaución: Estas citas no son 100% exactas.