APA (7th ed.) Citation

Worldwatch Institute & Brown, L. R. (1999). State of the world, 1999: A Worldwatch Institute report on progress toward a sustainable society. Norton.

Chicago Style (17th ed.) Citation

Worldwatch Institute and Lester R. Brown. State of the World, 1999: A Worldwatch Institute Report on Progress Toward a Sustainable Society. New York: Norton, 1999.

MLA (9th ed.) Citation

Worldwatch Institute and Lester R. Brown. State of the World, 1999: A Worldwatch Institute Report on Progress Toward a Sustainable Society. Norton, 1999.