APA (7e ed.) Bronvermelding

Smith, T. M., & Smith, R. L. (2009). Elements of ecology (7th ed.). Pearson Benjamin Cummings.

Chicago (17e ed.) Bronvermelding

Smith, T. M., en Robert Leo Smith. Elements of Ecology. 7th ed. San Francisco: Pearson Benjamin Cummings, 2009.

MLA (9e ed.) Bronvermelding

Smith, T. M., en Robert Leo Smith. Elements of Ecology. 7th ed. Pearson Benjamin Cummings, 2009.