APA (7th ed.) Citation

Smith, T. M., & Smith, R. L. (2006). Elements of ecology (Sixth edition.). Benjamin Cummings.

Chicago Style (17th ed.) Citation

Smith, T. M., and Robert Leo Smith. Elements of Ecology. Sixth edition. San Francisco, CA: Benjamin Cummings, 2006.

MLA (8th ed.) Citation

Smith, T. M., and Robert Leo Smith. Elements of Ecology. Sixth edition. Benjamin Cummings, 2006.