Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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