North Vietnamese pilots being trained in Soviet Union. (2013). The History Channel website. Retrieved 7:33, May 25, 2013, from http://www.history.com/this-day-in-history/north-vietnamese-pilots-being-trained-in-soviet-union.
North Vietnamese pilots being trained in Soviet Union. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/north-vietnamese-pilots-being-trained-in-soviet-union [Accessed 25 May 2013].
“North Vietnamese pilots being trained in Soviet Union.” 2013. The History Channel website. May 25 2013, 7:33 http://www.history.com/this-day-in-history/north-vietnamese-pilots-being-trained-in-soviet-union.
“North Vietnamese pilots being trained in Soviet Union,” The History Channel website, 2013, http://www.history.com/this-day-in-history/north-vietnamese-pilots-being-trained-in-soviet-union [accessed May 25, 2013].
“North Vietnamese pilots being trained in Soviet Union,” The History Channel website, http://www.history.com/this-day-in-history/north-vietnamese-pilots-being-trained-in-soviet-union (accessed May 25, 2013).
North Vietnamese pilots being trained in Soviet Union [Internet]. The History Channel website; 2013 [cited 2013 May 25] Available from: http://www.history.com/this-day-in-history/north-vietnamese-pilots-being-trained-in-soviet-union.
North Vietnamese pilots being trained in Soviet Union, http://www.history.com/this-day-in-history/north-vietnamese-pilots-being-trained-in-soviet-union (last visited May 25, 2013).
North Vietnamese pilots being trained in Soviet Union. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/north-vietnamese-pilots-being-trained-in-soviet-union. Accessed May 25, 2013.