Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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