APA (7th ed.) Citation

Worldwatch Institute & Brown, L. R. (1999). State of the world 1999: A Worldwatch Institute report on progress towards a sustainable society (Special millennium ed.). Earthscan.

Chicago Style (17th ed.) Citation

Worldwatch Institute and Lester R. Brown. State of the World 1999: A Worldwatch Institute Report on Progress Towards a Sustainable Society. Special millennium ed. London: Earthscan, 1999.

MLA (8th ed.) Citation

Worldwatch Institute and Lester R. Brown. State of the World 1999: A Worldwatch Institute Report on Progress Towards a Sustainable Society. Special millennium ed. Earthscan, 1999.