Tohutoro APA (7th ed.)
Worldwatch Institute. State of the World 2013: Is Sustainability Still Possible? Island Press.
Tohutoru Kātū Chicago (17th ed.)
Worldwatch Institute. State of the World 2013: Is Sustainability Still Possible? Washington, EUA: Island Press.
Tohutoro MLA (9th ed.)
Worldwatch Institute. State of the World 2013: Is Sustainability Still Possible? Island Press.
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