- Cohen, Naomi. Encounter with Emancipation: The German Jews in the United States, 1830-1914. . Philadelphia, PA: Jewish Publication Society, 1984.
- Kobrin, Rebecca, ed. Chosen Capital: The Jewish Encounter with American Capitalism. . New Brunswick, NJ: Rutgers University Press, 2012.
- Lee, Michael. The Patriarch of Denver Merchants, Leopold Guldman and the Golden Eagle Dry Goods Company of Denver, 1879-1936. Colorado History. 15 (2009).
- Sarna, Jonathan D. (ed.). The American Jewish Experience. . New York: Holmes & Meier 1997.
- Guldman CollectionIra M. and Peryle H. Beck Archives of Rocky Mountain Jewish History. Special Collections, University Libraries, University of Denver