Darwin, C., & Darwin, F. (2010). The foundation of the Origin of species: Two essays written in 1842 and 1844 by Charles Darwin. Cambridge University Press.
Chicago-Zitierstil (17. Ausg.)Darwin, Charles, und Francis Darwin. The Foundation of the Origin of Species: Two Essays Written in 1842 and 1844 by Charles Darwin. Cambridge: Cambridge University Press, 2010.
MLA-Zitierstil (9. Ausg.)Darwin, Charles, und Francis Darwin. The Foundation of the Origin of Species: Two Essays Written in 1842 and 1844 by Charles Darwin. Cambridge University Press, 2010.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.