| Title | 1840 United States Federal Census, Quincy, Adams County, Illinois, National Archives Microfilm Roll 54 | |
| Author | National Archives and Records Administration | |
| Publisher | Name: Ancestry.com. 1840 United States Federal Census [database on-line]. Provo, UT, USA: The Generations Network, Inc., 2004; | |
| Source ID | S510 | |
