APA (7th ed.) Citation

Worldwatch Institute, Brown, L. R., & Starke, L. (1990). State of the world, 1990: Worldwatch Institute report on progress toward a sustainable society. Norton.

Chicago Style (17th ed.) Citation

Worldwatch Institute, Lester Russell Brown, and Linda Starke. State of the World, 1990: Worldwatch Institute Report on Progress Toward a Sustainable Society. New York: Norton, 1990.

MLA (9th ed.) Citation

Worldwatch Institute, et al. State of the World, 1990: Worldwatch Institute Report on Progress Toward a Sustainable Society. Norton, 1990.