@misc{Darwin_Charles_(1809-1882)_The,
 author={Darwin, Charles (1809-1882)},
 howpublished={online},
 publisher={Chicago : W.B. Conkey Company},
 language={eng},
 type={książka},
 title={The origin of species by means of natural selection : or the preservation of favored races in the struggle for life : two volumes in one},
 keywords={Ewolucja - teoria},
}