Illinois State Archives & United States. Census Office. 7th census, 1850. (1850). [Seventh census of the United States, 1850.
Chicago-referens (17:e uppl.)Illinois State Archives och 1850 United States. Census Office. 7th census. [Seventh Census of the United States, 1850. 1850.
MLA-referens (8:e uppl.)Illinois State Archives och 1850 United States. Census Office. 7th census. [Seventh Census of the United States, 1850. 1850.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.