Wilkins, J. S. (2009). Defining species: A sourcebook from antiquity to today. P. Lang.
Lua i Stíl Chicago (17ú heag.)Wilkins, John S. Defining Species: A Sourcebook from Antiquity to Today. New York: P. Lang, 2009.
Lua MLA (9ú heag.)Wilkins, John S. Defining Species: A Sourcebook from Antiquity to Today. P. Lang, 2009.
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