World Trade Center is bombed. (2013). The History Channel website. Retrieved 3:49, May 25, 2013, from http://www.history.com/this-day-in-history/world-trade-center-is-bombed.
World Trade Center is bombed. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/world-trade-center-is-bombed [Accessed 25 May 2013].
“World Trade Center is bombed.” 2013. The History Channel website. May 25 2013, 3:49 http://www.history.com/this-day-in-history/world-trade-center-is-bombed.
“World Trade Center is bombed,” The History Channel website, 2013, http://www.history.com/this-day-in-history/world-trade-center-is-bombed [accessed May 25, 2013].
“World Trade Center is bombed,” The History Channel website, http://www.history.com/this-day-in-history/world-trade-center-is-bombed (accessed May 25, 2013).
World Trade Center is bombed [Internet]. The History Channel website; 2013 [cited 2013 May 25] Available from: http://www.history.com/this-day-in-history/world-trade-center-is-bombed.
World Trade Center is bombed, http://www.history.com/this-day-in-history/world-trade-center-is-bombed (last visited May 25, 2013).
World Trade Center is bombed. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/world-trade-center-is-bombed. Accessed May 25, 2013.