Bois, W. E. B. D. The Conservation of Races: W. E. B. Du Bois. Theories of race and racism : a reader.(2003).
Lua i Stíl Chicago (17ú heag.)Bois, W. E. B. Du. "The Conservation of Races: W. E. B. Du Bois." Theories of Race and Racism : A Reader.(2003) .
Lua MLA (8ú heag.)Bois, W. E. B. Du. "The Conservation of Races: W. E. B. Du Bois." Theories of Race and Racism : A Reader.(2003), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.