APA (7th ed.) Citation

(1990). State of the world 1990, a world in watch institute report on progress toward a sustainable society. Unwin.

Chicago Style (17th ed.) Citation

State of the World 1990, a World in Watch Institute Report on Progress Toward a Sustainable Society. Unwin, 1990.

MLA (9th ed.) Citation

State of the World 1990, a World in Watch Institute Report on Progress Toward a Sustainable Society. Unwin, 1990.

Warning: These citations may not always be 100% accurate.