APA (7th ed.) Citation

United States. Census Office. 6th census, 1840, & United States. National Archives and Records Service. (1967). 1840 census schedules of mines, agriculture, commerce, and manufacturing for Ohio. National Archives, National Archives and Records Service, General Services Administration.

Chicago Style (17th ed.) Citation

United States. Census Office. 6th census, 1840, and United States. National Archives and Records Service. 1840 Census Schedules of Mines, Agriculture, Commerce, and Manufacturing for Ohio. Washington: National Archives, National Archives and Records Service, General Services Administration, 1967.

MLA (8th ed.) Citation

United States. Census Office. 6th census, 1840, and United States. National Archives and Records Service. 1840 Census Schedules of Mines, Agriculture, Commerce, and Manufacturing for Ohio. National Archives, National Archives and Records Service, General Services Administration, 1967.