Battle of Yorktown begins. (2013). The History Channel website. Retrieved 7:48, May 19, 2013, from http://www.history.com/this-day-in-history/battle-of-yorktown-begins.
Battle of Yorktown begins. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/battle-of-yorktown-begins [Accessed 19 May 2013].
“Battle of Yorktown begins.” 2013. The History Channel website. May 19 2013, 7:48 http://www.history.com/this-day-in-history/battle-of-yorktown-begins.
“Battle of Yorktown begins,” The History Channel website, 2013, http://www.history.com/this-day-in-history/battle-of-yorktown-begins [accessed May 19, 2013].
“Battle of Yorktown begins,” The History Channel website, http://www.history.com/this-day-in-history/battle-of-yorktown-begins (accessed May 19, 2013).
Battle of Yorktown begins [Internet]. The History Channel website; 2013 [cited 2013 May 19] Available from: http://www.history.com/this-day-in-history/battle-of-yorktown-begins.
Battle of Yorktown begins, http://www.history.com/this-day-in-history/battle-of-yorktown-begins (last visited May 19, 2013).
Battle of Yorktown begins. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/battle-of-yorktown-begins. Accessed May 19, 2013.