APA

Ramírez Ronda C. H., Harrington P., Bermúdez R. H., Gutiérrez J. J. & Vázquez G. (19810116). [Vaccination: 1980 principles and practice. Review and concepts. II. Rubella, influenza, pneumococcus vaccine, mumps, meningococcus, trips to foreign countries]. : Boletin de la Asociacion Medica de Puerto Rico.

Chicago

Ramírez Ronda C H, Harrington P, Bermúdez R H, Gutiérrez J J and Vázquez G. 19810116. [Vaccination: 1980 principles and practice. Review and concepts. II. Rubella, influenza, pneumococcus vaccine, mumps, meningococcus, trips to foreign countries]. : Boletin de la Asociacion Medica de Puerto Rico.

Harvard

Ramírez Ronda C. H., Harrington P., Bermúdez R. H., Gutiérrez J. J. and Vázquez G. (19810116). [Vaccination: 1980 principles and practice. Review and concepts. II. Rubella, influenza, pneumococcus vaccine, mumps, meningococcus, trips to foreign countries]. : Boletin de la Asociacion Medica de Puerto Rico.

MLA

Ramírez Ronda C H, Harrington P, Bermúdez R H, Gutiérrez J J and Vázquez G. [Vaccination: 1980 principles and practice. Review and concepts. II. Rubella, influenza, pneumococcus vaccine, mumps, meningococcus, trips to foreign countries]. : Boletin de la Asociacion Medica de Puerto Rico. 19810116.