Cita APA (7th ed.)

Smith, R. L. (1995). Ecology and Field Biology. HarperCollins College Publishers.

Cita Chicago (17th ed.)

Smith, Robert Leo. Ecology and Field Biology. New York: HarperCollins College Publishers, 1995.

Cita MLA (9th ed.)

Smith, Robert Leo. Ecology and Field Biology. HarperCollins College Publishers, 1995.