Du Bois. The Problem of the Color Line at the Turn of the Twentieth Century. Fordham University Press.
Lua i Stíl Chicago (17ú heag.)Du Bois. The Problem of the Color Line at the Turn of the Twentieth Century. Fordham University Press.
Lua MLA (9ú heag.)Du Bois. The Problem of the Color Line at the Turn of the Twentieth Century. Fordham University Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.