Origins of Slavery in America. (2013). The History Channel website. Retrieved 2:50, May 20, 2013, from http://www.history.com/videos/origins-of-slavery.
Origins of Slavery in America. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/videos/origins-of-slavery [Accessed 20 May 2013].
“Origins of Slavery in America.” 2013. The History Channel website. May 20 2013, 2:50 http://www.history.com/videos/origins-of-slavery.
“Origins of Slavery in America,” The History Channel website, 2013, http://www.history.com/videos/origins-of-slavery [accessed May 20, 2013].
“Origins of Slavery in America,” The History Channel website, http://www.history.com/videos/origins-of-slavery (accessed May 20, 2013).
Origins of Slavery in America [Internet]. The History Channel website; 2013 [cited 2013 May 20] Available from: http://www.history.com/videos/origins-of-slavery.
Origins of Slavery in America, http://www.history.com/videos/origins-of-slavery (last visited May 20, 2013).
Origins of Slavery in America. The History Channel website. 2013. Available at: http://www.history.com/videos/origins-of-slavery. Accessed May 20, 2013.