First World War erupts in Europe. (2013). The History Channel website. Retrieved 4:45, May 22, 2013, from http://www.history.com/this-day-in-history/first-world-war-erupts-in-europe.
First World War erupts in Europe. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/first-world-war-erupts-in-europe [Accessed 22 May 2013].
“First World War erupts in Europe.” 2013. The History Channel website. May 22 2013, 4:45 http://www.history.com/this-day-in-history/first-world-war-erupts-in-europe.
“First World War erupts in Europe,” The History Channel website, 2013, http://www.history.com/this-day-in-history/first-world-war-erupts-in-europe [accessed May 22, 2013].
“First World War erupts in Europe,” The History Channel website, http://www.history.com/this-day-in-history/first-world-war-erupts-in-europe (accessed May 22, 2013).
First World War erupts in Europe [Internet]. The History Channel website; 2013 [cited 2013 May 22] Available from: http://www.history.com/this-day-in-history/first-world-war-erupts-in-europe.
First World War erupts in Europe, http://www.history.com/this-day-in-history/first-world-war-erupts-in-europe (last visited May 22, 2013).
First World War erupts in Europe. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/first-world-war-erupts-in-europe. Accessed May 22, 2013.