Cita APA

Smith, T. M. 1., & Smith, R. L. (2009). Elements of ecology (7. edition.). San Francisco: Benjamin Cummings.

Citación estilo Chicago

Smith, Thomas Michael 1955-, y Robert Leo Smith. Elements of Ecology. 7. edition. San Francisco: Benjamin Cummings, 2009.

Cita MLA

Smith, Thomas Michael 1955-, y Robert Leo Smith. Elements of Ecology. 7. edition. San Francisco: Benjamin Cummings, 2009.