U.S. and Soviet negotiators make progress. (2013). The History Channel website. Retrieved 2:21, May 20, 2013, from http://www.history.com/this-day-in-history/us-and-soviet-negotiators-make-progress.
U.S. and Soviet negotiators make progress. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/us-and-soviet-negotiators-make-progress [Accessed 20 May 2013].
“U.S. and Soviet negotiators make progress.” 2013. The History Channel website. May 20 2013, 2:21 http://www.history.com/this-day-in-history/us-and-soviet-negotiators-make-progress.
“U.S. and Soviet negotiators make progress,” The History Channel website, 2013, http://www.history.com/this-day-in-history/us-and-soviet-negotiators-make-progress [accessed May 20, 2013].
“U.S. and Soviet negotiators make progress,” The History Channel website, http://www.history.com/this-day-in-history/us-and-soviet-negotiators-make-progress (accessed May 20, 2013).
U.S. and Soviet negotiators make progress [Internet]. The History Channel website; 2013 [cited 2013 May 20] Available from: http://www.history.com/this-day-in-history/us-and-soviet-negotiators-make-progress.
U.S. and Soviet negotiators make progress, http://www.history.com/this-day-in-history/us-and-soviet-negotiators-make-progress (last visited May 20, 2013).
U.S. and Soviet negotiators make progress. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/us-and-soviet-negotiators-make-progress. Accessed May 20, 2013.