Blassingame, J. W. (1976). Frederick Douglass: The clarion voice. Division of Publications, National Park Service, U.S. Department of the Interior.
Chicago-Zitierstil (17. Ausg.)Blassingame, John W. Frederick Douglass: The Clarion Voice. Washington, DC: Division of Publications, National Park Service, U.S. Department of the Interior, 1976.
MLA-Zitierstil (9. Ausg.)Blassingame, John W. Frederick Douglass: The Clarion Voice. Division of Publications, National Park Service, U.S. Department of the Interior, 1976.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.