APA (7th ed.) Citation

SS, H., BI, T., TL, M., & SC, R. (2009). Protecting vulnerable populations from pandemic influenza in the United States: A strategic imperative. American Journal of Public Health, 99(S2), S243.

Chicago Style (17th ed.) Citation

SS, Hutchins, Truman BI, Merlin TL, and Redd SC. "Protecting Vulnerable Populations from Pandemic Influenza in the United States: A Strategic Imperative." American Journal of Public Health 99, no. S2 (2009): S243.

MLA (9th ed.) Citation

SS, Hutchins, et al. "Protecting Vulnerable Populations from Pandemic Influenza in the United States: A Strategic Imperative." American Journal of Public Health, vol. 99, no. S2, 2009, p. S243.