Charles, D. M. (2007). J. Edgar Hoover and the Anti-Interventionists: FBI Political Surveillance and the Rise of the Domestic Security State, 1939-1945. Ohio State University Press.

Charles, Douglas M. J. Edgar Hoover and the Anti-Interventionists: FBI Political Surveillance and the Rise of the Domestic Security State, 1939-1945. Columbus: Ohio State University Press, 2007.

Charles, Douglas M. J. Edgar Hoover and the Anti-Interventionists: FBI Political Surveillance and the Rise of the Domestic Security State, 1939-1945. Ohio State University Press, 2007.