APA (7th ed.) Citation

Worldwatch Institute & Brown, L. R. (1990). State of the world, 2000: A Worldwatch Institute report on progress toward a sustainable society. W. Norton.

Chicago Style (17th ed.) Citation

Worldwatch Institute and Lester Russell Brown. State of the World, 2000: A Worldwatch Institute Report on Progress Toward a Sustainable Society. New York: W. Norton, 1990.

MLA (9th ed.) Citation

Worldwatch Institute and Lester Russell Brown. State of the World, 2000: A Worldwatch Institute Report on Progress Toward a Sustainable Society. W. Norton, 1990.