European Union treaty signed. (2013). The History Channel website. Retrieved 4:32, May 25, 2013, from http://www.history.com/this-day-in-history/european-union-treaty-signed.
European Union treaty signed. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/european-union-treaty-signed [Accessed 25 May 2013].
“European Union treaty signed.” 2013. The History Channel website. May 25 2013, 4:32 http://www.history.com/this-day-in-history/european-union-treaty-signed.
“European Union treaty signed,” The History Channel website, 2013, http://www.history.com/this-day-in-history/european-union-treaty-signed [accessed May 25, 2013].
“European Union treaty signed,” The History Channel website, http://www.history.com/this-day-in-history/european-union-treaty-signed (accessed May 25, 2013).
European Union treaty signed [Internet]. The History Channel website; 2013 [cited 2013 May 25] Available from: http://www.history.com/this-day-in-history/european-union-treaty-signed.
European Union treaty signed, http://www.history.com/this-day-in-history/european-union-treaty-signed (last visited May 25, 2013).
European Union treaty signed. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/european-union-treaty-signed. Accessed May 25, 2013.