APA (7th ed.) Zitazioa

American Journal of Perinatology. Cambridge University Press.

Chicago Style (17th ed.) Zitazioa

American Journal of Perinatology. Cambridge University Press.

MLA (9th ed.) Zitazioa

American Journal of Perinatology. Cambridge University Press.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.