APA
Berninger A., Webber M. P., Cohen H. W., Gustave J., Lee R., Niles J. K., Chiu S., Zeig-Owens R., Soo J., Kelly K. & Prezant D. J. (20100831). Trends of elevated PTSD risk in firefighters exposed to the World Trade Center disaster: 2001-2005. : Public health reports (Washington, D.C. : 1974).
Chicago
Berninger Amy, Webber Mayris P, Cohen Hillel W, Gustave Jackson, Lee Roy, Niles Justin K, Chiu Sydney, Zeig-Owens Rachel, Soo Jackie, Kelly Kerry and Prezant David J. 20100831. Trends of elevated PTSD risk in firefighters exposed to the World Trade Center disaster: 2001-2005. : Public health reports (Washington, D.C. : 1974).
Harvard
Berninger A., Webber M. P., Cohen H. W., Gustave J., Lee R., Niles J. K., Chiu S., Zeig-Owens R., Soo J., Kelly K. and Prezant D. J. (20100831). Trends of elevated PTSD risk in firefighters exposed to the World Trade Center disaster: 2001-2005. : Public health reports (Washington, D.C. : 1974).
MLA
Berninger Amy, Webber Mayris P, Cohen Hillel W, Gustave Jackson, Lee Roy, Niles Justin K, Chiu Sydney, Zeig-Owens Rachel, Soo Jackie, Kelly Kerry and Prezant David J. Trends of elevated PTSD risk in firefighters exposed to the World Trade Center disaster: 2001-2005. : Public health reports (Washington, D.C. : 1974). 20100831.