APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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