Cita APA (7a ed.)

Smith, T. M., & Smith, R. L. (2015). Elements of ecology (Ninth edition, Global edition.). PearsonEducational Limited.

Cita Chicago Style (17a ed.)

Smith, Thomas M., y Robert Leo Smith. Elements of Ecology. Ninth edition, Global edition. Harlow Essex, England: PearsonEducational Limited, 2015.

Cita MLA (9a ed.)

Smith, Thomas M., y Robert Leo Smith. Elements of Ecology. Ninth edition, Global edition. PearsonEducational Limited, 2015.