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"5 Technological Innovations from WW1." HISTORY. N.p., 12 Aug. 2014. Web. 22 Nov. 2015.
"World War I: The Players." World War I: The Players. N.p., n.d. Web. 22 Nov. 2015.
"Legacy of World War I Video." History.com. A&E Television Networks, n.d. Web. 22 Nov. 2015.
"European History." Causes of the First World War. N.p., n.d. Web. 22 Nov. 2015.