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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)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.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.