Alderton, D. (2014). The World Encyclopedia of Birds. Hermes House.
Chicago Style (17th ed.) ZitazioaAlderton, David. The World Encyclopedia of Birds. London: Hermes House, 2014.
MLA (9th ed.) ZitazioaAlderton, David. The World Encyclopedia of Birds. Hermes House, 2014.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.