Lincoln watches a balloon ascension. (2013). The History Channel website. Retrieved 2:33, May 25, 2013, from http://www.history.com/this-day-in-history/lincoln-watches-a-balloon-ascension.
Lincoln watches a balloon ascension. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/lincoln-watches-a-balloon-ascension [Accessed 25 May 2013].
“Lincoln watches a balloon ascension.” 2013. The History Channel website. May 25 2013, 2:33 http://www.history.com/this-day-in-history/lincoln-watches-a-balloon-ascension.
“Lincoln watches a balloon ascension,” The History Channel website, 2013, http://www.history.com/this-day-in-history/lincoln-watches-a-balloon-ascension [accessed May 25, 2013].
“Lincoln watches a balloon ascension,” The History Channel website, http://www.history.com/this-day-in-history/lincoln-watches-a-balloon-ascension (accessed May 25, 2013).
Lincoln watches a balloon ascension [Internet]. The History Channel website; 2013 [cited 2013 May 25] Available from: http://www.history.com/this-day-in-history/lincoln-watches-a-balloon-ascension.
Lincoln watches a balloon ascension, http://www.history.com/this-day-in-history/lincoln-watches-a-balloon-ascension (last visited May 25, 2013).
Lincoln watches a balloon ascension. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/lincoln-watches-a-balloon-ascension. Accessed May 25, 2013.