Cita APA

Smith, R. L., & Smith, T. M. (2000). Elements of ecology (4th ed.). Addison Wesley Longman, Inc.

Citación estilo Chicago

Smith, Robert Leo, and Thomas M. Smith. Elements of Ecology. 4th ed. New York: Addison Wesley Longman, Inc, 2000.

Cita MLA

Smith, Robert Leo, and Thomas M. Smith. Elements of Ecology. 4th ed. Addison Wesley Longman, Inc, 2000.