APA (7th ed.) Citation

Smith, R. L., & Smith, T. M. (2000). Elements of ecology (4th ed. update.). Benjamin Cummings.

Chicago Style (17th ed.) Citation

Smith, Robert Leo, and T. M. Smith. Elements of Ecology. 4th ed. update. San Francisco, Calif: Benjamin Cummings, 2000.

MLA (9th ed.) Citation

Smith, Robert Leo, and T. M. Smith. Elements of Ecology. 4th ed. update. Benjamin Cummings, 2000.