World Health Organization. State of the world's vaccines and inmunization.
Citazione stile Chigago Style (17a edizione)World Health Organization. State of the World's Vaccines and Inmunization.
Citatione MLA (8a ed.)World Health Organization. State of the World's Vaccines and Inmunization.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.