APA (7th ed.) Citation

Horn, S. F. (1973). Invisible empire: The story of the Ku Klux Klan, 1866-1871. Haskell House.

Chicago Style (17th ed.) Citation

Horn, Stanley F. Invisible Empire: The Story of the Ku Klux Klan, 1866-1871. New York: Haskell House, 1973.

MLA (9th ed.) Citation

Horn, Stanley F. Invisible Empire: The Story of the Ku Klux Klan, 1866-1871. Haskell House, 1973.

Warning: These citations may not always be 100% accurate.