Powell becomes Joint Chiefs' chairman. (2013). The History Channel website. Retrieved 9:35, May 22, 2013, from http://www.history.com/this-day-in-history/powell-becomes-joint-chiefs-chairman.
Powell becomes Joint Chiefs' chairman. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/powell-becomes-joint-chiefs-chairman [Accessed 22 May 2013].
“Powell becomes Joint Chiefs' chairman.” 2013. The History Channel website. May 22 2013, 9:35 http://www.history.com/this-day-in-history/powell-becomes-joint-chiefs-chairman.
“Powell becomes Joint Chiefs' chairman,” The History Channel website, 2013, http://www.history.com/this-day-in-history/powell-becomes-joint-chiefs-chairman [accessed May 22, 2013].
“Powell becomes Joint Chiefs' chairman,” The History Channel website, http://www.history.com/this-day-in-history/powell-becomes-joint-chiefs-chairman (accessed May 22, 2013).
Powell becomes Joint Chiefs' chairman [Internet]. The History Channel website; 2013 [cited 2013 May 22] Available from: http://www.history.com/this-day-in-history/powell-becomes-joint-chiefs-chairman.
Powell becomes Joint Chiefs' chairman, http://www.history.com/this-day-in-history/powell-becomes-joint-chiefs-chairman (last visited May 22, 2013).
Powell becomes Joint Chiefs' chairman. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/powell-becomes-joint-chiefs-chairman. Accessed May 22, 2013.