APA (7th ed.) Zitazioa

NLM in Focus. U.S. National Library of Medicine.

Chicago Style (17th ed.) Zitazioa

NLM in Focus. U.S. National Library of Medicine.

MLA (9th ed.) Zitazioa

NLM in Focus. U.S. National Library of Medicine.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.