Frederick Douglass. (2013). The History Channel website. Retrieved 3:40, May 22, 2013, from http://www.history.com/videos/frederick-douglas.
Frederick Douglass. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/videos/frederick-douglas [Accessed 22 May 2013].
“Frederick Douglass.” 2013. The History Channel website. May 22 2013, 3:40 http://www.history.com/videos/frederick-douglas.
“Frederick Douglass,” The History Channel website, 2013, http://www.history.com/videos/frederick-douglas [accessed May 22, 2013].
“Frederick Douglass,” The History Channel website, http://www.history.com/videos/frederick-douglas (accessed May 22, 2013).
Frederick Douglass [Internet]. The History Channel website; 2013 [cited 2013 May 22] Available from: http://www.history.com/videos/frederick-douglas.
Frederick Douglass, http://www.history.com/videos/frederick-douglas (last visited May 22, 2013).
Frederick Douglass. The History Channel website. 2013. Available at: http://www.history.com/videos/frederick-douglas. Accessed May 22, 2013.