National Geographic. (2008). The science book: Everything you need to know about the world and how it works. National Geographic.
Citace podle Chicago (17th ed.)National Geographic. The Science Book: Everything You Need to Know About the World and How It Works. Washington, D.C: National Geographic, 2008.
Citace podle MLA (9th ed.)National Geographic. The Science Book: Everything You Need to Know About the World and How It Works. National Geographic, 2008.
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