Citace podle APA (7th ed.)
Worldwatch Institute. Vital Signs, Volume 20: The Trends That Are Shaping Our Future. Island Press.
Citace podle Chicago (17th ed.)
Worldwatch Institute. Vital Signs, Volume 20: The Trends That Are Shaping Our Future. Washington, EUA: Island Press.
Citace podle MLA (9th ed.)
Worldwatch Institute. Vital Signs, Volume 20: The Trends That Are Shaping Our Future. Island Press.
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