Cita APA (7th ed.)

Worldwatch Institute, Brown, L. R., & Starke, L. (2001). State of the world, 2001: A Worldwatch Institute report on progress toward a sustainable society. Norton.

Cita Chicago (17th ed.)

Worldwatch Institute, Lester Russell Brown, i Linda Starke. State of the World, 2001: A Worldwatch Institute Report on Progress Toward a Sustainable Society. New York: Norton, 2001.

Cita MLA (9th ed.)

Worldwatch Institute, et al. State of the World, 2001: A Worldwatch Institute Report on Progress Toward a Sustainable Society. Norton, 2001.