Farrar, L. L. (1961). German diplomacy and peace negotiations August, 1914 - March, 1918. University of Oxford.
Lua i Stíl Chicago (17ú heag.)Farrar, L. L. German Diplomacy and Peace Negotiations August, 1914 - March, 1918. England: University of Oxford, 1961.
Lua MLA (8ú heag.)Farrar, L. L. German Diplomacy and Peace Negotiations August, 1914 - March, 1918. University of Oxford, 1961.
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