APA (7th ed.) Zitazioa
Bird, W. (1991). The orgin of species revisited: The theories of evolution and of abrupt appearance. Regency.
Chicago Style (17th ed.) Zitazioa
Bird, W.R. The Orgin of Species Revisited: The Theories of Evolution and of Abrupt Appearance. Tennessee: Regency, 1991.
MLA (9th ed.) Zitazioa
Bird, W.R. The Orgin of Species Revisited: The Theories of Evolution and of Abrupt Appearance. Regency, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.