Twenty-four die in Army helicopter accident. (2013). The History Channel website. Retrieved 5:10, May 23, 2013, from http://www.history.com/this-day-in-history/twenty-four-die-in-army-helicopter-accident.
Twenty-four die in Army helicopter accident. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/twenty-four-die-in-army-helicopter-accident [Accessed 23 May 2013].
“Twenty-four die in Army helicopter accident.” 2013. The History Channel website. May 23 2013, 5:10 http://www.history.com/this-day-in-history/twenty-four-die-in-army-helicopter-accident.
“Twenty-four die in Army helicopter accident,” The History Channel website, 2013, http://www.history.com/this-day-in-history/twenty-four-die-in-army-helicopter-accident [accessed May 23, 2013].
“Twenty-four die in Army helicopter accident,” The History Channel website, http://www.history.com/this-day-in-history/twenty-four-die-in-army-helicopter-accident (accessed May 23, 2013).
Twenty-four die in Army helicopter accident [Internet]. The History Channel website; 2013 [cited 2013 May 23] Available from: http://www.history.com/this-day-in-history/twenty-four-die-in-army-helicopter-accident.
Twenty-four die in Army helicopter accident, http://www.history.com/this-day-in-history/twenty-four-die-in-army-helicopter-accident (last visited May 23, 2013).
Twenty-four die in Army helicopter accident. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/twenty-four-die-in-army-helicopter-accident. Accessed May 23, 2013.