APA (7th ed.) Citation

Smith, T. M., & Smith, R. L. (2009). Elements of ecology (7th ed.). Pearson Benjamin Cummings.

Chicago Style (17th ed.) Citation

Smith, T. M., and Robert Leo Smith. Elements of Ecology. 7th ed. San Francisco: Pearson Benjamin Cummings, 2009.

MLA (9th ed.) Citation

Smith, T. M., and Robert Leo Smith. Elements of Ecology. 7th ed. Pearson Benjamin Cummings, 2009.