Massacre at Virginia Tech leaves 32 dead. (2013). The History Channel website. Retrieved 1:54, May 20, 2013, from http://www.history.com/this-day-in-history/massacre-at-virginia-tech-leaves-32-dead.
Massacre at Virginia Tech leaves 32 dead. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/massacre-at-virginia-tech-leaves-32-dead [Accessed 20 May 2013].
“Massacre at Virginia Tech leaves 32 dead.” 2013. The History Channel website. May 20 2013, 1:54 http://www.history.com/this-day-in-history/massacre-at-virginia-tech-leaves-32-dead.
“Massacre at Virginia Tech leaves 32 dead,” The History Channel website, 2013, http://www.history.com/this-day-in-history/massacre-at-virginia-tech-leaves-32-dead [accessed May 20, 2013].
“Massacre at Virginia Tech leaves 32 dead,” The History Channel website, http://www.history.com/this-day-in-history/massacre-at-virginia-tech-leaves-32-dead (accessed May 20, 2013).
Massacre at Virginia Tech leaves 32 dead [Internet]. The History Channel website; 2013 [cited 2013 May 20] Available from: http://www.history.com/this-day-in-history/massacre-at-virginia-tech-leaves-32-dead.
Massacre at Virginia Tech leaves 32 dead, http://www.history.com/this-day-in-history/massacre-at-virginia-tech-leaves-32-dead (last visited May 20, 2013).
Massacre at Virginia Tech leaves 32 dead. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/massacre-at-virginia-tech-leaves-32-dead. Accessed May 20, 2013.