Du Bois. The Problem of the Color Line at the Turn of the Twentieth Century. Fordham University Press.
Dyfyniad Arddull ChicagoDu Bois. The Problem of the Color Line at the Turn of the Twentieth Century. Fordham University Press.
Dyfyniad MLADu Bois. The Problem of the Color Line at the Turn of the Twentieth Century. Fordham University Press.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.