Cita APA (7a ed.)

Smith, R. L., & Smith, T. M. (2002). Elements of ecology (4th ed.). Pearson Education Asia.

Cita Chicago Style (17a ed.)

Smith, Robert Leo, y T. M. Smith. Elements of Ecology. 4th ed. Singapore: Pearson Education Asia, 2002.

Cita MLA (9a ed.)

Smith, Robert Leo, y T. M. Smith. Elements of Ecology. 4th ed. Pearson Education Asia, 2002.