Cita APA (7th ed.)

Rittner, D. (2004). Encyclopedia of biology. Facts on File, Inc.

Cita Chicago (17th ed.)

Rittner, Don. Encyclopedia of Biology. New York: Facts on File, Inc, 2004.

Cita MLA (9th ed.)

Rittner, Don. Encyclopedia of Biology. Facts on File, Inc, 2004.