World Health Organization. State of the world's vaccines and inmunization.
Lua i Stíl Chicago (17ú heag.)World Health Organization. State of the World's Vaccines and Inmunization.
Lua MLA (8ú heag.)World Health Organization. State of the World's Vaccines and Inmunization.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.