Cita APA (7a ed.)

Smith, R. L. (1995). Ecology and field biology (5th ed.). Harper Collins.

Cita Chicago Style (17a ed.)

Smith, Robert Leo. Ecology and Field Biology. 5th ed. New York: Harper Collins, 1995.

Cita MLA (9a ed.)

Smith, Robert Leo. Ecology and Field Biology. 5th ed. Harper Collins, 1995.