German forces cross the Somme River. (2013). The History Channel website. Retrieved 1:56, May 24, 2013, from http://www.history.com/this-day-in-history/german-forces-cross-the-somme-river.
German forces cross the Somme River. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/german-forces-cross-the-somme-river [Accessed 24 May 2013].
“German forces cross the Somme River.” 2013. The History Channel website. May 24 2013, 1:56 http://www.history.com/this-day-in-history/german-forces-cross-the-somme-river.
“German forces cross the Somme River,” The History Channel website, 2013, http://www.history.com/this-day-in-history/german-forces-cross-the-somme-river [accessed May 24, 2013].
“German forces cross the Somme River,” The History Channel website, http://www.history.com/this-day-in-history/german-forces-cross-the-somme-river (accessed May 24, 2013).
German forces cross the Somme River [Internet]. The History Channel website; 2013 [cited 2013 May 24] Available from: http://www.history.com/this-day-in-history/german-forces-cross-the-somme-river.
German forces cross the Somme River, http://www.history.com/this-day-in-history/german-forces-cross-the-somme-river (last visited May 24, 2013).
German forces cross the Somme River. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/german-forces-cross-the-somme-river. Accessed May 24, 2013.