^Kitchen, Martin (2006), Europe Between the Wars: A Political History (Edisi Second), Pearson Education, hlm. 249
^Barth, Boris (2006), Genozid: Völkermord im 20. Jahrhundert : Geschichte, Theorien, Kontroversen (dalam bahasa German), C. H. Beck, hlm. 176 Pemeliharaan CS1: Bahasa yang tidak diketahui (link)
^Serge, Victor (2011), Witness to the German Revolution, Haymarket Books, hlm. 232
^Gunlicks, Arthur B. (2011), Comparing Liberal Democracies: The United States, United Kingdom, France, Germany, and the European Union, iUniverse, hlm. 127
^Ringer, Fritz K. (1990), The Decline of the German Mandarins: The German Academic Community, 1890-1933, University Press of New England, hlm. 201
^Eric D. Weitz, Weimar Germany: Promise and Tragedy. (Princeton: Princeton University, 2007), 95-96.
^Caldwell, Peter C. (1997), Popular Sovereignty and the Crisis of German Constitutional Law: The Theory & Practice of Weimar Constitutionalism, Duke University Press, hlm. 74
^Caldwell, Peter C. (2008), "The Citizen and the Republic in Germany, 1918–1935", Citizenship and National Identity in Twentieth-Century Germany, Stanford University Press, hlm. 48
^Adolf Hitler: a biographical companion David Nicholls page 178 November 1, 2000 The main nationalist party the German National People's Party DNVP was divided between reactionary conservative monarchists, who wished to turn the clock back to the pre-1918 Kaisereich, and more radical volkisch and anti-semitic elements. It also inherited the support of old Pan-German League, whose nationalistsm rested on belief in the inherent superiority of the German people
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