Congress abolishes the African slave trade. (2013). The History Channel website. Retrieved 6:40, May 22, 2013, from http://www.history.com/this-day-in-history/congress-abolishes-the-african-slave-trade.
Congress abolishes the African slave trade. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/congress-abolishes-the-african-slave-trade [Accessed 22 May 2013].
“Congress abolishes the African slave trade.” 2013. The History Channel website. May 22 2013, 6:40 http://www.history.com/this-day-in-history/congress-abolishes-the-african-slave-trade.
“Congress abolishes the African slave trade,” The History Channel website, 2013, http://www.history.com/this-day-in-history/congress-abolishes-the-african-slave-trade [accessed May 22, 2013].
“Congress abolishes the African slave trade,” The History Channel website, http://www.history.com/this-day-in-history/congress-abolishes-the-african-slave-trade (accessed May 22, 2013).
Congress abolishes the African slave trade [Internet]. The History Channel website; 2013 [cited 2013 May 22] Available from: http://www.history.com/this-day-in-history/congress-abolishes-the-african-slave-trade.
Congress abolishes the African slave trade, http://www.history.com/this-day-in-history/congress-abolishes-the-african-slave-trade (last visited May 22, 2013).
Congress abolishes the African slave trade. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/congress-abolishes-the-african-slave-trade. Accessed May 22, 2013.