Cita APA (7a ed.)

Worldwatch Institute, Brown, L. R., Flavin, C., .French, H. F., Starke, L., & .Abramovitz, J. N. (1997). State of the world, 1997: A Worldwatch Institute report on progress toward a sustainable society. Norton.

Cita Chicago Style (17a ed.)

Worldwatch Institute, Lester Russell Brown, Christopher Flavin, Hilary F. .French, Linda Starke, y Janet N. .Abramovitz. State of the World, 1997: A Worldwatch Institute Report on Progress Toward a Sustainable Society. New York: Norton, 1997.

Cita MLA (9a ed.)

Worldwatch Institute, et al. State of the World, 1997: A Worldwatch Institute Report on Progress Toward a Sustainable Society. Norton, 1997.