Worldwatch Institute, Assadourian, E., Prugh, T., & Starke, L. (2013). State of the world 2013: Is sustainability still possible? Island Press.
Citace podle Chicago (17th ed.)Worldwatch Institute, Erik Assadourian, Thomas Prugh, a Linda Starke. State of the World 2013: Is Sustainability Still Possible? Washington, DC: Island Press, 2013.
Citace podle MLA (9th ed.)Worldwatch Institute, et al. State of the World 2013: Is Sustainability Still Possible? Island Press, 2013.
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