Worldwatch Institute & Brown, L. R. (2000). State of the world, 2000: A Worldwatch Institute report on progress toward a sustainable society. Norton.
Lua i Stíl Chicago (17ú heag.)Worldwatch Institute agus Lester Russell Brown. State of the World, 2000: A Worldwatch Institute Report on Progress Toward a Sustainable Society. New York: Norton, 2000.
Lua MLA (9ú heag.)Worldwatch Institute agus Lester Russell Brown. State of the World, 2000: A Worldwatch Institute Report on Progress Toward a Sustainable Society. Norton, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.