Worldwatch Institute. (2014). Vital signs. Island Press.
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Citação norma Chicago
Worldwatch Institute. Vital Signs. Washington, District of Columbia: Island Press, 2014.
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Citação norma MLA
Worldwatch Institute. Vital Signs. Island Press, 2014.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.