World Health Organization. Global Influenza Programme. (2009). Pandemic influenza preparedness and response: A WHO guidance document. World Health Organization.
Cita Chicago Style (17a ed.)World Health Organization. Global Influenza Programme. Pandemic Influenza Preparedness and Response: A WHO Guidance Document. Geneva: World Health Organization, 2009.
Cita MLA (9a ed.)World Health Organization. Global Influenza Programme. Pandemic Influenza Preparedness and Response: A WHO Guidance Document. World Health Organization, 2009.
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