APA (7th ed.) Citation

Smith, R. L., & Smith, T. (2001). Ecology and field biology (6th ed.). Harper & Row.

Chicago Style (17th ed.) Citation

Smith, Robert Leo, and Thomas Smith. Ecology and Field Biology. 6th ed. New York: Harper & Row, 2001.

MLA (9th ed.) Citation

Smith, Robert Leo, and Thomas Smith. Ecology and Field Biology. 6th ed. Harper & Row, 2001.