Pilot Francis Gary Powers charged with espionage. (2013). The History Channel website. Retrieved 2:15, May 24, 2013, from http://www.history.com/this-day-in-history/pilot-francis-gary-powers-charged-with-espionage.
Pilot Francis Gary Powers charged with espionage. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/pilot-francis-gary-powers-charged-with-espionage [Accessed 24 May 2013].
“Pilot Francis Gary Powers charged with espionage.” 2013. The History Channel website. May 24 2013, 2:15 http://www.history.com/this-day-in-history/pilot-francis-gary-powers-charged-with-espionage.
“Pilot Francis Gary Powers charged with espionage,” The History Channel website, 2013, http://www.history.com/this-day-in-history/pilot-francis-gary-powers-charged-with-espionage [accessed May 24, 2013].
“Pilot Francis Gary Powers charged with espionage,” The History Channel website, http://www.history.com/this-day-in-history/pilot-francis-gary-powers-charged-with-espionage (accessed May 24, 2013).
Pilot Francis Gary Powers charged with espionage [Internet]. The History Channel website; 2013 [cited 2013 May 24] Available from: http://www.history.com/this-day-in-history/pilot-francis-gary-powers-charged-with-espionage.
Pilot Francis Gary Powers charged with espionage, http://www.history.com/this-day-in-history/pilot-francis-gary-powers-charged-with-espionage (last visited May 24, 2013).
Pilot Francis Gary Powers charged with espionage. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/pilot-francis-gary-powers-charged-with-espionage. Accessed May 24, 2013.