Neil Armstrong. (2013). The History Channel website. Retrieved 5:30, May 21, 2013, from http://www.history.com/topics/neil-armstrong.
Neil Armstrong. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/topics/neil-armstrong [Accessed 21 May 2013].
“Neil Armstrong.” 2013. The History Channel website. May 21 2013, 5:30 http://www.history.com/topics/neil-armstrong.
“Neil Armstrong,” The History Channel website, 2013, http://www.history.com/topics/neil-armstrong [accessed May 21, 2013].
“Neil Armstrong,” The History Channel website, http://www.history.com/topics/neil-armstrong (accessed May 21, 2013).
Neil Armstrong [Internet]. The History Channel website; 2013 [cited 2013 May 21] Available from: http://www.history.com/topics/neil-armstrong.
Neil Armstrong, http://www.history.com/topics/neil-armstrong (last visited May 21, 2013).
Neil Armstrong. The History Channel website. 2013. Available at: http://www.history.com/topics/neil-armstrong. Accessed May 21, 2013.