APA (7th ed.) Citation

(1990). State Of The World 1990: A Worldwatch Institute Report On Progress Towards A Sustainable Society. W.W Norton & Company.

Chicago Style (17th ed.) Citation

State Of The World 1990: A Worldwatch Institute Report On Progress Towards A Sustainable Society. London: W.W Norton & Company, 1990.

MLA (9th ed.) Citation

State Of The World 1990: A Worldwatch Institute Report On Progress Towards A Sustainable Society. W.W Norton & Company, 1990.