12.“Present-Day Judaism and Its Intellectual Trends” in Wissenschaftliche Zeitschrift fiir Jiidische Theologie, cited in Max Weiner(ed.), Abraham Geiger and Liberal Judaism : The Challenge of the Nineteenth Century(Philadelphia : Jewish Publication Society , 1962), p. 266
13. Cited from Paul Mendes and Jehuda Reinharz (eds.), The Jew in the Modern World, 2 ed.(New York : Oxford University Press , 1995), p. 196