APA (7th ed.) Zitazioa
Gert, B. (2005). Morality: Its nature and justification (Rev. ed.). Oxford University Press.
Chicago Style (17th ed.) Zitazioa
Gert, Bernard. Morality: Its Nature and Justification. Rev. ed. Oxford ; New York: Oxford University Press, 2005.
MLA (9th ed.) Zitazioa
Gert, Bernard. Morality: Its Nature and Justification. Rev. ed. Oxford University Press, 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.