Voyager completes global flight. (2013). The History Channel website. Retrieved 5:13, May 21, 2013, from http://www.history.com/this-day-in-history/voyager-completes-global-flight.
Voyager completes global flight. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/voyager-completes-global-flight [Accessed 21 May 2013].
“Voyager completes global flight.” 2013. The History Channel website. May 21 2013, 5:13 http://www.history.com/this-day-in-history/voyager-completes-global-flight.
“Voyager completes global flight,” The History Channel website, 2013, http://www.history.com/this-day-in-history/voyager-completes-global-flight [accessed May 21, 2013].
“Voyager completes global flight,” The History Channel website, http://www.history.com/this-day-in-history/voyager-completes-global-flight (accessed May 21, 2013).
Voyager completes global flight [Internet]. The History Channel website; 2013 [cited 2013 May 21] Available from: http://www.history.com/this-day-in-history/voyager-completes-global-flight.
Voyager completes global flight, http://www.history.com/this-day-in-history/voyager-completes-global-flight (last visited May 21, 2013).
Voyager completes global flight. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/voyager-completes-global-flight. Accessed May 21, 2013.