The Preparedness Day bombing. (2013). The History Channel website. Retrieved 6:22, May 23, 2013, from http://www.history.com/this-day-in-history/the-preparedness-day-bombing.
The Preparedness Day bombing. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/the-preparedness-day-bombing [Accessed 23 May 2013].
“The Preparedness Day bombing.” 2013. The History Channel website. May 23 2013, 6:22 http://www.history.com/this-day-in-history/the-preparedness-day-bombing.
“The Preparedness Day bombing,” The History Channel website, 2013, http://www.history.com/this-day-in-history/the-preparedness-day-bombing [accessed May 23, 2013].
“The Preparedness Day bombing,” The History Channel website, http://www.history.com/this-day-in-history/the-preparedness-day-bombing (accessed May 23, 2013).
The Preparedness Day bombing [Internet]. The History Channel website; 2013 [cited 2013 May 23] Available from: http://www.history.com/this-day-in-history/the-preparedness-day-bombing.
The Preparedness Day bombing, http://www.history.com/this-day-in-history/the-preparedness-day-bombing (last visited May 23, 2013).
The Preparedness Day bombing. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/the-preparedness-day-bombing. Accessed May 23, 2013.