Clay knocks out Liston. (2013). The History Channel website. Retrieved 12:18, May 23, 2013, from http://www.history.com/this-day-in-history/clay-knocks-out-liston.
Clay knocks out Liston. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/clay-knocks-out-liston [Accessed 23 May 2013].
“Clay knocks out Liston.” 2013. The History Channel website. May 23 2013, 12:18 http://www.history.com/this-day-in-history/clay-knocks-out-liston.
“Clay knocks out Liston,” The History Channel website, 2013, http://www.history.com/this-day-in-history/clay-knocks-out-liston [accessed May 23, 2013].
“Clay knocks out Liston,” The History Channel website, http://www.history.com/this-day-in-history/clay-knocks-out-liston (accessed May 23, 2013).
Clay knocks out Liston [Internet]. The History Channel website; 2013 [cited 2013 May 23] Available from: http://www.history.com/this-day-in-history/clay-knocks-out-liston.
Clay knocks out Liston, http://www.history.com/this-day-in-history/clay-knocks-out-liston (last visited May 23, 2013).
Clay knocks out Liston. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/clay-knocks-out-liston. Accessed May 23, 2013.