Worldwatch Institute, Brown, L. R., & Starke, L. (1988). State of the world 1988: A Worldwatch Institute report on progress toward a sustainable society. Norton.
Lua i Stíl Chicago (17ú heag.)Worldwatch Institute, Lester R. Brown, agus Linda Starke. State of the World 1988: A Worldwatch Institute Report on Progress Toward a Sustainable Society. New York : London: Norton, 1988.
Lua MLA (8ú heag.)Worldwatch Institute, et al. State of the World 1988: A Worldwatch Institute Report on Progress Toward a Sustainable Society. Norton, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.