Johnson, D. M. (2011). Three prehistoric inventions that shaped us. Peter Lang.
Citace podle Chicago (17th ed.)Johnson, David Martel. Three Prehistoric Inventions That Shaped Us. New York: Peter Lang, 2011.
Citace podle MLA (9th ed.)Johnson, David Martel. Three Prehistoric Inventions That Shaped Us. Peter Lang, 2011.
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