APA (7th ed.) Zitazioa

DARWIN, C. (1872). The Origin of species. 0.U.Pr.

Chicago Style (17th ed.) Zitazioa

DARWIN, Charles. The Origin of Species. London: 0.U.Pr, 1872.

MLA (9th ed.) Zitazioa

DARWIN, Charles. The Origin of Species. 0.U.Pr, 1872.