Hillstrom, K. (2013). World War I and the age of modern warfare. Omnigraphics.
Cita Chicago (17th ed.)Hillstrom, Kevin. World War I and the Age of Modern Warfare. Detroit, MI: Omnigraphics, 2013.
Cita MLA (9th ed.)Hillstrom, Kevin. World War I and the Age of Modern Warfare. Omnigraphics, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.