Yuri Gagarin Is First Man in Space. (2013). The History Channel website. Retrieved 1:05, May 20, 2013, from http://www.history.com/speeches/yuri-gagarin-is-first-man-in-space.
Yuri Gagarin Is First Man in Space. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/speeches/yuri-gagarin-is-first-man-in-space [Accessed 20 May 2013].
“Yuri Gagarin Is First Man in Space.” 2013. The History Channel website. May 20 2013, 1:05 http://www.history.com/speeches/yuri-gagarin-is-first-man-in-space.
“Yuri Gagarin Is First Man in Space,” The History Channel website, 2013, http://www.history.com/speeches/yuri-gagarin-is-first-man-in-space [accessed May 20, 2013].
“Yuri Gagarin Is First Man in Space,” The History Channel website, http://www.history.com/speeches/yuri-gagarin-is-first-man-in-space (accessed May 20, 2013).
Yuri Gagarin Is First Man in Space [Internet]. The History Channel website; 2013 [cited 2013 May 20] Available from: http://www.history.com/speeches/yuri-gagarin-is-first-man-in-space.
Yuri Gagarin Is First Man in Space, http://www.history.com/speeches/yuri-gagarin-is-first-man-in-space (last visited May 20, 2013).
Yuri Gagarin Is First Man in Space. The History Channel website. 2013. Available at: http://www.history.com/speeches/yuri-gagarin-is-first-man-in-space. Accessed May 20, 2013.