Cita APA (7th ed.)

Smith, R. L., & Smith, T. M. (2000). Elements of ecology (4th ed. update.). Pearson Education Asia Pte.

Cita Chicago (17th ed.)

Smith, Robert Leo, i T. M. Smith. Elements of Ecology. 4th ed. update. Singapore: Pearson Education Asia Pte, 2000.

Cita MLA (9th ed.)

Smith, Robert Leo, i T. M. Smith. Elements of Ecology. 4th ed. update. Pearson Education Asia Pte, 2000.