APA (7th ed.) Citation

Kennedy, J. C. G. (1864). Population of the United States in 1860. [Census Office].

Chicago Style (17th ed.) Citation

Kennedy, J. C. G. Population of the United States in 1860. [Washington, D.C.]: [Census Office], 1864.

MLA (9th ed.) Citation

Kennedy, J. C. G. Population of the United States in 1860. [Census Office], 1864.