Hillstrom, K. (2013). World War I and the age of modern warfare. Omnigraphics.
Lua i Stíl Chicago (17ú heag.)Hillstrom, Kevin. World War I and the Age of Modern Warfare. Detroit, MI: Omnigraphics, 2013.
Lua MLA (9ú heag.)Hillstrom, Kevin. World War I and the Age of Modern Warfare. Omnigraphics, 2013.
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