APA (7th ed.) Citation

Smith, R. L., & Smith, T. M. (2006). Elements of ecology / Robert Leo Smith, Thomas M. Smith (6th ed.). Benjamin Cummings.

Chicago Style (17th ed.) Citation

Smith, Robert Leo, and T. M. Smith. Elements of Ecology / Robert Leo Smith, Thomas M. Smith. 6th ed. San Francisco, Calif. ; Harlow: Benjamin Cummings, 2006.

MLA (9th ed.) Citation

Smith, Robert Leo, and T. M. Smith. Elements of Ecology / Robert Leo Smith, Thomas M. Smith. 6th ed. Benjamin Cummings, 2006.

Warning: These citations may not always be 100% accurate.