Yu, H., Feng, Z., Uyeki, T. M., Liao, Q., Zhou, L., Feng, L., . . . Wang, Y. (2011). Risk Factors for Severe Illness with 2009 Pandemic Influenza A (H1N1) Virus Infection in China. Oxford University Press.
Chicago-tyylinen lähdeviittausYu, Hongjie, et al. Risk Factors for Severe Illness With 2009 Pandemic Influenza A (H1N1) Virus Infection in China. Oxford University Press, 2011.
MLA-viiteYu, Hongjie, et al. Risk Factors for Severe Illness With 2009 Pandemic Influenza A (H1N1) Virus Infection in China. Oxford University Press, 2011.
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