Donahue, Donald A. "BioWatch and the Brown Cap" Journal of Homeland Security and Emergency Management, 8.1 (2011): -. Retrieved 23 May. 2013, from doi:10.2202/1547-7355.1823

Donahue, D. (2011). BioWatch and the Brown Cap. Journal of Homeland Security and Emergency Management, 8(1), pp. -. Retrieved 23 May. 2013, from doi:10.2202/1547-7355.1823

Donahue, Donald A. 2011. BioWatch and the Brown Cap. Journal of Homeland Security and Emergency Management. 8(1): -. Retrieved 23 May. 2013, from doi:10.2202/1547-7355.1823