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.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHalweil, Brian, Lisa Mastny, Eric Assadourian, Linda Starke, और Worldwatch Institute. State of World, 2004: A Worldwatch Institute Report on Progress Towords a Sustainable Society. London : Earthscan, 2004.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHalweil, Brian, et al. State of World, 2004: A Worldwatch Institute Report on Progress Towords a Sustainable Society. London : Earthscan, 2004.
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