The Fate of Reason.German Philosophy from Kant to Fichte.Cambridge,Mass.,1987.
Berdahl,Robert M.The Politics of the Prussian Nobility.The Development of a Conservative Ideology,1770-1848.Princeton,1988.
Berlin,Isaiah.Against the Current.New York,1980.
Bigler,Robert M.The Politics of German Protestantism.The Rise of the Protestant Church Elite in Prussia,1815-1848.Berkeley,1972.