Halweil, B., Mastny, L., Assadourian, E., Starke, L., & Institute, W. (2004). State of world, 2004: A Worldwatch Institute report on progress towords a sustainable society. London : Earthscan.
Lua i Stíl Chicago (17ú heag.)Halweil, Brian, Lisa Mastny, Eric Assadourian, Linda Starke, agus Worldwatch Institute. State of World, 2004: A Worldwatch Institute Report on Progress Towords a Sustainable Society. London : Earthscan, 2004.
Lua MLA (9ú heag.)Halweil, Brian, et al. State of World, 2004: A Worldwatch Institute Report on Progress Towords a Sustainable Society. London : Earthscan, 2004.
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