Illinois State Archives & United States. Census Office. 7th census, 1850. (1850). [Seventh census of the United States, 1850.
Παραπομπή σε μορφή Chicago (17η εκδ.)Illinois State Archives και 1850 United States. Census Office. 7th census. [Seventh Census of the United States, 1850. 1850.
Παραπομπή σε μορφή MLA (8th εκδ.)Illinois State Archives και 1850 United States. Census Office. 7th census. [Seventh Census of the United States, 1850. 1850.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.