Calley trial defense begins. (2013). The History Channel website. Retrieved 9:19, June 19, 2013, from http://www.history.com/this-day-in-history/calley-trial-defense-begins.
Calley trial defense begins. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/calley-trial-defense-begins [Accessed 19 Jun 2013].
“Calley trial defense begins.” 2013. The History Channel website. Jun 19 2013, 9:19 http://www.history.com/this-day-in-history/calley-trial-defense-begins.
“Calley trial defense begins,” The History Channel website, 2013, http://www.history.com/this-day-in-history/calley-trial-defense-begins [accessed Jun 19, 2013].
“Calley trial defense begins,” The History Channel website, http://www.history.com/this-day-in-history/calley-trial-defense-begins (accessed Jun 19, 2013).
Calley trial defense begins [Internet]. The History Channel website; 2013 [cited 2013 Jun 19] Available from: http://www.history.com/this-day-in-history/calley-trial-defense-begins.
Calley trial defense begins, http://www.history.com/this-day-in-history/calley-trial-defense-begins (last visited Jun 19, 2013).
Calley trial defense begins. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/calley-trial-defense-begins. Accessed Jun 19, 2013.