Cita APA (7a ed.)

FELTWELL, J. (1986). The natural history of butterflies. Facts on file pub.

Cita Chicago Style (17a ed.)

FELTWELL, John. The Natural History of Butterflies. New York: Facts on file pub, 1986.

Cita MLA (9a ed.)

FELTWELL, John. The Natural History of Butterflies. Facts on file pub, 1986.