An ex-Marine goes on a killing spree at the University of Texas. (2013). The History Channel website. Retrieved 7:25, June 20, 2013, from http://www.history.com/this-day-in-history/an-ex-marine-goes-on-a-killing-spree-at-the-university-of-texas.
An ex-Marine goes on a killing spree at the University of Texas. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/an-ex-marine-goes-on-a-killing-spree-at-the-university-of-texas [Accessed 20 Jun 2013].
“An ex-Marine goes on a killing spree at the University of Texas.” 2013. The History Channel website. Jun 20 2013, 7:25 http://www.history.com/this-day-in-history/an-ex-marine-goes-on-a-killing-spree-at-the-university-of-texas.
“An ex-Marine goes on a killing spree at the University of Texas,” The History Channel website, 2013, http://www.history.com/this-day-in-history/an-ex-marine-goes-on-a-killing-spree-at-the-university-of-texas [accessed Jun 20, 2013].
“An ex-Marine goes on a killing spree at the University of Texas,” The History Channel website, http://www.history.com/this-day-in-history/an-ex-marine-goes-on-a-killing-spree-at-the-university-of-texas (accessed Jun 20, 2013).
An ex-Marine goes on a killing spree at the University of Texas [Internet]. The History Channel website; 2013 [cited 2013 Jun 20] Available from: http://www.history.com/this-day-in-history/an-ex-marine-goes-on-a-killing-spree-at-the-university-of-texas.
An ex-Marine goes on a killing spree at the University of Texas, http://www.history.com/this-day-in-history/an-ex-marine-goes-on-a-killing-spree-at-the-university-of-texas (last visited Jun 20, 2013).
An ex-Marine goes on a killing spree at the University of Texas. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/an-ex-marine-goes-on-a-killing-spree-at-the-university-of-texas. Accessed Jun 20, 2013.