APA (7th ed.) Citation

Smith, R. L., & Smith, T. M. (2003). Elements of ecology (5th ed.). Benjamin Cummings.

Chicago Style (17th ed.) Citation

Smith, Robert Leo, and T. M. Smith. Elements of Ecology. 5th ed. San Francisco: Benjamin Cummings, 2003.

MLA (9th ed.) Citation

Smith, Robert Leo, and T. M. Smith. Elements of Ecology. 5th ed. Benjamin Cummings, 2003.