U.S. prison population exceeds one million. (2013). The History Channel website. Retrieved 11:15, May 25, 2013, from http://www.history.com/this-day-in-history/us-prison-population-exceeds-one-million.
U.S. prison population exceeds one million. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/us-prison-population-exceeds-one-million [Accessed 25 May 2013].
“U.S. prison population exceeds one million.” 2013. The History Channel website. May 25 2013, 11:15 http://www.history.com/this-day-in-history/us-prison-population-exceeds-one-million.
“U.S. prison population exceeds one million,” The History Channel website, 2013, http://www.history.com/this-day-in-history/us-prison-population-exceeds-one-million [accessed May 25, 2013].
“U.S. prison population exceeds one million,” The History Channel website, http://www.history.com/this-day-in-history/us-prison-population-exceeds-one-million (accessed May 25, 2013).
U.S. prison population exceeds one million [Internet]. The History Channel website; 2013 [cited 2013 May 25] Available from: http://www.history.com/this-day-in-history/us-prison-population-exceeds-one-million.
U.S. prison population exceeds one million, http://www.history.com/this-day-in-history/us-prison-population-exceeds-one-million (last visited May 25, 2013).
U.S. prison population exceeds one million. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/us-prison-population-exceeds-one-million. Accessed May 25, 2013.