Robert F. Kennedy. (2013). The History Channel website. Retrieved 12:51, May 19, 2013, from http://www.history.com/topics/robert-f-kennedy.
Robert F. Kennedy. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/topics/robert-f-kennedy [Accessed 19 May 2013].
“Robert F. Kennedy.” 2013. The History Channel website. May 19 2013, 12:51 http://www.history.com/topics/robert-f-kennedy.
“Robert F. Kennedy,” The History Channel website, 2013, http://www.history.com/topics/robert-f-kennedy [accessed May 19, 2013].
“Robert F. Kennedy,” The History Channel website, http://www.history.com/topics/robert-f-kennedy (accessed May 19, 2013).
Robert F. Kennedy [Internet]. The History Channel website; 2013 [cited 2013 May 19] Available from: http://www.history.com/topics/robert-f-kennedy.
Robert F. Kennedy, http://www.history.com/topics/robert-f-kennedy (last visited May 19, 2013).
Robert F. Kennedy. The History Channel website. 2013. Available at: http://www.history.com/topics/robert-f-kennedy. Accessed May 19, 2013.