Boman, D. K. (2006). Lincoln's resolute unionist: Hamilton Gamble, Dred Scott dissenter and Missouri's Civil War governor. Louisiana University Press.
Chicago-referens (17:e uppl.)Boman, Dennis K. Lincoln's Resolute Unionist: Hamilton Gamble, Dred Scott Dissenter and Missouri's Civil War Governor. Baton Rouge: Louisiana University Press, 2006.
MLA-referens (9:e uppl.)Boman, Dennis K. Lincoln's Resolute Unionist: Hamilton Gamble, Dred Scott Dissenter and Missouri's Civil War Governor. Louisiana University Press, 2006.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.