Becker, Carl L. (Carl Lotus), 1873-1945
History of modern Europe : course one absolute government and democratic revolution
Silver Burdett, 1944
 Buku Teks
Mill, John Stuart
Utilitarianism, liberty, and representative government
E.P. Dutton and Company, 1955
 Buku Teks
Becker, Carl L. (Carl Lotus), 1873-1945
History of modern Europe. Course one absolute government and democratic revolution : a self-teaching course, based on modern history
Silver Burdett, 1944
 Buku Teks
Hayes, Carlton J. H.
Modern Europe to 1870
New York Macmillan, 1958 c. 1953,
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White, James L.
The Origins of modern Europe
Washington Square Press, 1966
 Buku Teks