Citação norma APA

LeDuc, J. W., & Jahrling, P. B. (2001). Strengthening national preparedness for smallpox: An update. Centers for Disease Control and Prevention.

Citação norma Chicago

LeDuc, J W., and P B. Jahrling. Strengthening National Preparedness for Smallpox: An Update. Centers for Disease Control and Prevention, 2001.

Citação norma MLA

LeDuc, J W., and P B. Jahrling. Strengthening National Preparedness for Smallpox: An Update. Centers for Disease Control and Prevention, 2001.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.