APA (7th ed.) Citation

O'Connor, T. H. (1972). The disunited States: The era of Civil War and Reconstruction. Dodd, Mead.

Chicago Style (17th ed.) Citation

O'Connor, Thomas H. The Disunited States: The Era of Civil War and Reconstruction. New York: Dodd, Mead, 1972.

MLA (8th ed.) Citation

O'Connor, Thomas H. The Disunited States: The Era of Civil War and Reconstruction. Dodd, Mead, 1972.