LeDuc, J. W., & Jahrling, P. B. (2001). Strengthening national preparedness for smallpox: An update. Centers for Disease Control and Prevention.
استشهاد بنمط شيكاغوLeDuc, J W., و P B. Jahrling. Strengthening National Preparedness for Smallpox: An Update. Centers for Disease Control and Prevention, 2001.
MLA استشهادLeDuc, J W., و P B. Jahrling. Strengthening National Preparedness for Smallpox: An Update. Centers for Disease Control and Prevention, 2001.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.