Cite
How to maintain surveillance for novel influenza A H1N1 when there are too many cases to count.
MLA
Lipsitch, Marc, et al. “How to Maintain Surveillance for Novel Influenza A H1N1 When There Are Too Many Cases to Count.” Lancet, vol. 374, no. 9696, Oct. 2009, pp. 1209–11. EBSCOhost, https://doi.org/10.1016/S0140-6736(09)61377-5.
APA
Lipsitch, M., Hayden, F. G., Cowling, B. J., & Leung, G. M. (2009). How to maintain surveillance for novel influenza A H1N1 when there are too many cases to count. Lancet, 374(9696), 1209–1211. https://doi.org/10.1016/S0140-6736(09)61377-5
Chicago
Lipsitch, Marc, Frederick G. Hayden, Benjamin J. Cowling, and Gabriel M. Leung. 2009. “How to Maintain Surveillance for Novel Influenza A H1N1 When There Are Too Many Cases to Count.” Lancet 374 (9696): 1209–11. doi:10.1016/S0140-6736(09)61377-5.