Centers for Disease Control and Prevention (U. S.), Department of Health and Human Services (U.S), & Public Health Training Network. (2002). Smallpox: Vaccine administration. Centers for Disease Control and Prevention.
Cita Chicago Style (17a ed.)Centers for Disease Control and Prevention (U. S.), Department of Health and Human Services (U.S), y Public Health Training Network. Smallpox: Vaccine Administration. [Georgia]: Centers for Disease Control and Prevention, 2002.
Cita MLA (9a ed.)Centers for Disease Control and Prevention (U. S.), et al. Smallpox: Vaccine Administration. Centers for Disease Control and Prevention, 2002.
Precaución: Estas citas no son 100% exactas.