U.S. Census Bureau & United States. National Archives and Records Administration. (2002). 15th census, population, 1930. National Archives and Records Administration.
Chicago-referens (17:e uppl.)U.S. Census Bureau och United States. National Archives and Records Administration. 15th Census, Population, 1930. [Washington, D.C.: National Archives and Records Administration, 2002.
MLA-referens (8:e uppl.)U.S. Census Bureau och United States. National Archives and Records Administration. 15th Census, Population, 1930. National Archives and Records Administration, 2002.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.