Gunman kills five students at Amish school. (2013). The History Channel website. Retrieved 12:36, May 25, 2013, from http://www.history.com/this-day-in-history/gunman-kills-five-students-at-amish-school.
Gunman kills five students at Amish school. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/gunman-kills-five-students-at-amish-school [Accessed 25 May 2013].
“Gunman kills five students at Amish school.” 2013. The History Channel website. May 25 2013, 12:36 http://www.history.com/this-day-in-history/gunman-kills-five-students-at-amish-school.
“Gunman kills five students at Amish school,” The History Channel website, 2013, http://www.history.com/this-day-in-history/gunman-kills-five-students-at-amish-school [accessed May 25, 2013].
“Gunman kills five students at Amish school,” The History Channel website, http://www.history.com/this-day-in-history/gunman-kills-five-students-at-amish-school (accessed May 25, 2013).
Gunman kills five students at Amish school [Internet]. The History Channel website; 2013 [cited 2013 May 25] Available from: http://www.history.com/this-day-in-history/gunman-kills-five-students-at-amish-school.
Gunman kills five students at Amish school, http://www.history.com/this-day-in-history/gunman-kills-five-students-at-amish-school (last visited May 25, 2013).
Gunman kills five students at Amish school. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/gunman-kills-five-students-at-amish-school. Accessed May 25, 2013.