East Germany opens the Berlin Wall. (2013). The History Channel website. Retrieved 3:31, May 22, 2013, from http://www.history.com/this-day-in-history/east-germany-opens-the-berlin-wall.
East Germany opens the Berlin Wall. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/east-germany-opens-the-berlin-wall [Accessed 22 May 2013].
“East Germany opens the Berlin Wall.” 2013. The History Channel website. May 22 2013, 3:31 http://www.history.com/this-day-in-history/east-germany-opens-the-berlin-wall.
“East Germany opens the Berlin Wall,” The History Channel website, 2013, http://www.history.com/this-day-in-history/east-germany-opens-the-berlin-wall [accessed May 22, 2013].
“East Germany opens the Berlin Wall,” The History Channel website, http://www.history.com/this-day-in-history/east-germany-opens-the-berlin-wall (accessed May 22, 2013).
East Germany opens the Berlin Wall [Internet]. The History Channel website; 2013 [cited 2013 May 22] Available from: http://www.history.com/this-day-in-history/east-germany-opens-the-berlin-wall.
East Germany opens the Berlin Wall, http://www.history.com/this-day-in-history/east-germany-opens-the-berlin-wall (last visited May 22, 2013).
East Germany opens the Berlin Wall. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/east-germany-opens-the-berlin-wall. Accessed May 22, 2013.