APA-referens (7:e uppl.)
Quammen, D. (2002). The Origin of species: Descent of a text, with modification. Library of Congress.
Chicago-referens (17:e uppl.)
Quammen, David. The Origin of Species: Descent of a Text, with Modification. Washington, DC: Library of Congress, 2002.
MLA-referens (9:e uppl.)
Quammen, David. The Origin of Species: Descent of a Text, with Modification. Library of Congress, 2002.
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