APA Edition Citation

Lester R Brown. (1991). State of the world 1991: A worldwatch institute report o progress toward a sustainable society. Worldwatch institute.

Chicago Edition Citation

Lester R Brown. State of the World 1991: A Worldwatch Institute Report O Progress Toward a Sustainable Society. New Delhi: Worldwatch institute, 1991.

MLA Edition Citation

Lester R Brown. State of the World 1991: A Worldwatch Institute Report O Progress Toward a Sustainable Society. Worldwatch institute, 1991.

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