The Tri-State Tornado. (2013). The History Channel website. Retrieved 5:47, May 18, 2013, from http://www.history.com/this-day-in-history/the-tri-state-tornado.
The Tri-State Tornado. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/the-tri-state-tornado [Accessed 18 May 2013].
“The Tri-State Tornado.” 2013. The History Channel website. May 18 2013, 5:47 http://www.history.com/this-day-in-history/the-tri-state-tornado.
“The Tri-State Tornado,” The History Channel website, 2013, http://www.history.com/this-day-in-history/the-tri-state-tornado [accessed May 18, 2013].
“The Tri-State Tornado,” The History Channel website, http://www.history.com/this-day-in-history/the-tri-state-tornado (accessed May 18, 2013).
The Tri-State Tornado [Internet]. The History Channel website; 2013 [cited 2013 May 18] Available from: http://www.history.com/this-day-in-history/the-tri-state-tornado.
The Tri-State Tornado, http://www.history.com/this-day-in-history/the-tri-state-tornado (last visited May 18, 2013).
The Tri-State Tornado. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/the-tri-state-tornado. Accessed May 18, 2013.