Cita APA

Smith, R. L. (1974). Ecology and field biology (2a. ed.). New York: Harper and Row.

Citación estilo Chicago

Smith, Robert Leo. Ecology and Field Biology. 2a. ed. New York: Harper and Row, 1974.

Cita MLA

Smith, Robert Leo. Ecology and Field Biology. 2a. ed. New York: Harper and Row, 1974.