Cita APA

Bell, P. R. Darwin´s Biological Work ; Some Aspects Reconsidered / P. R. Bell. New York : Wiley.

Citación estilo Chicago

Bell, P. R. Darwin´s Biological Work ; Some Aspects Reconsidered / P. R. Bell. New York : Wiley.

Cita MLA

Bell, P. R. Darwin´s Biological Work ; Some Aspects Reconsidered / P. R. Bell. New York : Wiley.