Cita APA (7th ed.)
Brown, L. R., Flavin, C., French, H., & Starke, L. State of the World 2001: A Worldwatch Institute Report on Progress Toward a Sustainable Society. Norton : Worldwatch Institute.
Cita Chicago (17th ed.)
Brown, Lester R., Christopher Flavin, Hilary French, i Linda Starke. State of the World 2001: A Worldwatch Institute Report on Progress Toward a Sustainable Society. Nueva York, EUA: Norton : Worldwatch Institute.
Cita MLA (9th ed.)
Brown, Lester R., et al. State of the World 2001: A Worldwatch Institute Report on Progress Toward a Sustainable Society. Norton : Worldwatch Institute.
Atenció: Aquestes cites poden no estar 100% correctes.