Kennedy becomes fourth president to be assassinated. (2013). The History Channel website. Retrieved 9:36, May 22, 2013, from http://www.history.com/this-day-in-history/kennedy-becomes-fourth-president-to-be-assassinated.
Kennedy becomes fourth president to be assassinated. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/kennedy-becomes-fourth-president-to-be-assassinated [Accessed 22 May 2013].
“Kennedy becomes fourth president to be assassinated.” 2013. The History Channel website. May 22 2013, 9:36 http://www.history.com/this-day-in-history/kennedy-becomes-fourth-president-to-be-assassinated.
“Kennedy becomes fourth president to be assassinated,” The History Channel website, 2013, http://www.history.com/this-day-in-history/kennedy-becomes-fourth-president-to-be-assassinated [accessed May 22, 2013].
“Kennedy becomes fourth president to be assassinated,” The History Channel website, http://www.history.com/this-day-in-history/kennedy-becomes-fourth-president-to-be-assassinated (accessed May 22, 2013).
Kennedy becomes fourth president to be assassinated [Internet]. The History Channel website; 2013 [cited 2013 May 22] Available from: http://www.history.com/this-day-in-history/kennedy-becomes-fourth-president-to-be-assassinated.
Kennedy becomes fourth president to be assassinated, http://www.history.com/this-day-in-history/kennedy-becomes-fourth-president-to-be-assassinated (last visited May 22, 2013).
Kennedy becomes fourth president to be assassinated. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/kennedy-becomes-fourth-president-to-be-assassinated. Accessed May 22, 2013.