Cita APA

Darwin, C. (2008). Origins: Selected letters of Charles Darwin, 1825-1859 (Rev. ed.). University of Cambridge.

Chicago Edition Citation

Darwin, Charles. Origins: Selected Letters of Charles Darwin, 1825-1859. Rev. ed. Cambridge: University of Cambridge, 2008.

Cita MLA

Darwin, Charles. Origins: Selected Letters of Charles Darwin, 1825-1859. Rev. ed. University of Cambridge, 2008.