Dr. David Gunn is murdered by anti-abortion activist. (2013). The History Channel website. Retrieved 12:51, May 19, 2013, from http://www.history.com/this-day-in-history/dr-david-gunn-is-murdered-by-anti-abortion-activist.
Dr. David Gunn is murdered by anti-abortion activist. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/dr-david-gunn-is-murdered-by-anti-abortion-activist [Accessed 19 May 2013].
“Dr. David Gunn is murdered by anti-abortion activist.” 2013. The History Channel website. May 19 2013, 12:51 http://www.history.com/this-day-in-history/dr-david-gunn-is-murdered-by-anti-abortion-activist.
“Dr. David Gunn is murdered by anti-abortion activist,” The History Channel website, 2013, http://www.history.com/this-day-in-history/dr-david-gunn-is-murdered-by-anti-abortion-activist [accessed May 19, 2013].
“Dr. David Gunn is murdered by anti-abortion activist,” The History Channel website, http://www.history.com/this-day-in-history/dr-david-gunn-is-murdered-by-anti-abortion-activist (accessed May 19, 2013).
Dr. David Gunn is murdered by anti-abortion activist [Internet]. The History Channel website; 2013 [cited 2013 May 19] Available from: http://www.history.com/this-day-in-history/dr-david-gunn-is-murdered-by-anti-abortion-activist.
Dr. David Gunn is murdered by anti-abortion activist, http://www.history.com/this-day-in-history/dr-david-gunn-is-murdered-by-anti-abortion-activist (last visited May 19, 2013).
Dr. David Gunn is murdered by anti-abortion activist. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/dr-david-gunn-is-murdered-by-anti-abortion-activist. Accessed May 19, 2013.