APA-viite (7. p.)
Johnson, D. M. (2011). Three prehistoric inventions that shaped us. Peter Lang.
Chicago-viite (17. p.)
Johnson, David Martel. Three Prehistoric Inventions That Shaped Us. New York: Peter Lang, 2011.
MLA-viite (9. p.)
Johnson, David Martel. Three Prehistoric Inventions That Shaped Us. Peter Lang, 2011.
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