APA aipamena

FELTWELL, J. (1986). Butterflies. Facts On File Publications.

Chicago Style aipamena

FELTWELL, John. Butterflies. Facts On File Publications, 1986.

MLA aipamena

FELTWELL, John. Butterflies. Facts On File Publications, 1986.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.