APA

Ramírez Fernández R., . (19990303). [Efficacy of seroconversion and duration of immunity induced by the meningococcal serogroup C vaccine. Study included in the evaluation of the mass immunization of the population in the age group between 18 months and 19 years in the community of Madrid]. : Revista espanola de salud publica.

Chicago

Ramírez Fernández R, . 19990303. [Efficacy of seroconversion and duration of immunity induced by the meningococcal serogroup C vaccine. Study included in the evaluation of the mass immunization of the population in the age group between 18 months and 19 years in the community of Madrid]. : Revista espanola de salud publica.

Harvard

Ramírez Fernández R., . (19990303). [Efficacy of seroconversion and duration of immunity induced by the meningococcal serogroup C vaccine. Study included in the evaluation of the mass immunization of the population in the age group between 18 months and 19 years in the community of Madrid]. : Revista espanola de salud publica.

MLA

Ramírez Fernández R, . [Efficacy of seroconversion and duration of immunity induced by the meningococcal serogroup C vaccine. Study included in the evaluation of the mass immunization of the population in the age group between 18 months and 19 years in the community of Madrid]. : Revista espanola de salud publica. 19990303.