Doc Barker is killed by prison guards as he attempts to escape. (2013). The History Channel website. Retrieved 11:34, May 25, 2013, from http://www.history.com/this-day-in-history/doc-barker-is-killed-by-prison-guards-as-he-attempts-to-escape.
Doc Barker is killed by prison guards as he attempts to escape. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/doc-barker-is-killed-by-prison-guards-as-he-attempts-to-escape [Accessed 25 May 2013].
“Doc Barker is killed by prison guards as he attempts to escape.” 2013. The History Channel website. May 25 2013, 11:34 http://www.history.com/this-day-in-history/doc-barker-is-killed-by-prison-guards-as-he-attempts-to-escape.
“Doc Barker is killed by prison guards as he attempts to escape,” The History Channel website, 2013, http://www.history.com/this-day-in-history/doc-barker-is-killed-by-prison-guards-as-he-attempts-to-escape [accessed May 25, 2013].
“Doc Barker is killed by prison guards as he attempts to escape,” The History Channel website, http://www.history.com/this-day-in-history/doc-barker-is-killed-by-prison-guards-as-he-attempts-to-escape (accessed May 25, 2013).
Doc Barker is killed by prison guards as he attempts to escape [Internet]. The History Channel website; 2013 [cited 2013 May 25] Available from: http://www.history.com/this-day-in-history/doc-barker-is-killed-by-prison-guards-as-he-attempts-to-escape.
Doc Barker is killed by prison guards as he attempts to escape, http://www.history.com/this-day-in-history/doc-barker-is-killed-by-prison-guards-as-he-attempts-to-escape (last visited May 25, 2013).
Doc Barker is killed by prison guards as he attempts to escape. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/doc-barker-is-killed-by-prison-guards-as-he-attempts-to-escape. Accessed May 25, 2013.