APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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