APA (7th ed.) Citation

Brown. (1990). State of the world 1990: A worldwatch Institute Report on Progress toward a sustainable society. W.W. Norton & Co.

Chicago Style (17th ed.) Citation

Brown. State of the World 1990: A Worldwatch Institute Report on Progress Toward a Sustainable Society. New York: W.W. Norton & Co, 1990.

MLA (8th ed.) Citation

Brown. State of the World 1990: A Worldwatch Institute Report on Progress Toward a Sustainable Society. W.W. Norton & Co, 1990.