Tragedy on the Mississippi. (2013). The History Channel website. Retrieved 9:30, May 21, 2013, from http://www.history.com/this-day-in-history/tragedy-on-the-mississippi.
Tragedy on the Mississippi. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/tragedy-on-the-mississippi [Accessed 21 May 2013].
“Tragedy on the Mississippi.” 2013. The History Channel website. May 21 2013, 9:30 http://www.history.com/this-day-in-history/tragedy-on-the-mississippi.
“Tragedy on the Mississippi,” The History Channel website, 2013, http://www.history.com/this-day-in-history/tragedy-on-the-mississippi [accessed May 21, 2013].
“Tragedy on the Mississippi,” The History Channel website, http://www.history.com/this-day-in-history/tragedy-on-the-mississippi (accessed May 21, 2013).
Tragedy on the Mississippi [Internet]. The History Channel website; 2013 [cited 2013 May 21] Available from: http://www.history.com/this-day-in-history/tragedy-on-the-mississippi.
Tragedy on the Mississippi, http://www.history.com/this-day-in-history/tragedy-on-the-mississippi (last visited May 21, 2013).
Tragedy on the Mississippi. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/tragedy-on-the-mississippi. Accessed May 21, 2013.