APA (7th ed.) Zitazioa
ebrary, Inc. (2003). State of the world's vaccines and immunization (Rev. ed. 2003.). World Health Organization.
Chicago Style (17th ed.) Zitazioa
ebrary, Inc. State of the World's Vaccines and Immunization. Rev. ed. 2003. [Geneva]: World Health Organization, 2003.
MLA (9th ed.) Zitazioa
ebrary, Inc. State of the World's Vaccines and Immunization. Rev. ed. 2003. World Health Organization, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.