Di Fabio, J. L., Castañeda, E., Agudelo, C. I., De La Hoz, F., Hortal, M., Camou, T., . . . De Quadros, C. (2001). Evolution of Streptococcus pneumoniae serotypes and penicillin susceptibility in Latin America, Sireva-Vigía Group, 1993 to 1999. PAHO Sireva-Vigía Study Group. Pan American Health Organization. Web
Citación estilo ChicagoDi Fabio, J L., et al. Evolution of Streptococcus Pneumoniae Serotypes and Penicillin Susceptibility in Latin America, Sireva-Vigía Group, 1993 to 1999. PAHO Sireva-Vigía Study Group. Pan American Health Organization. 2001.
Cita MLADi Fabio, J L., et al. Evolution of Streptococcus Pneumoniae Serotypes and Penicillin Susceptibility in Latin America, Sireva-Vigía Group, 1993 to 1999. PAHO Sireva-Vigía Study Group. Pan American Health Organization. 2001.