United States Capitol Historical Society, ebrary, Inc, Finkelman, P., & Kennon, D. R. (2010). In the shadow of freedom: The politics of slavery in the national capital. Published for the United States Capitol Historical Society by Ohio University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United States Capitol Historical Society, Inc ebrary, Paul Finkelman, و Donald R. Kennon. In the Shadow of Freedom: The Politics of Slavery in the National Capital. Athens: Published for the United States Capitol Historical Society by Ohio University Press, 2010.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)United States Capitol Historical Society, et al. In the Shadow of Freedom: The Politics of Slavery in the National Capital. Published for the United States Capitol Historical Society by Ohio University Press, 2010.