Harrison, F. (1915). The German peril: Forecasts, 1864-1914. T. F. Unwin.
Lua i Stíl Chicago (17ú heag.)Harrison, Frederic. The German Peril: Forecasts, 1864-1914. London: T. F. Unwin, 1915.
Lua MLA (8ú heag.)Harrison, Frederic. The German Peril: Forecasts, 1864-1914. T. F. Unwin, 1915.
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