APA aipamena

W.E.B. Du Bois (Great Neck Publishing). Great Neck Publishing.

Chicago Style aipamena

W.E.B. Du Bois (Great Neck Publishing). Great Neck Publishing.

MLA aipamena

W.E.B. Du Bois (Great Neck Publishing). Great Neck Publishing.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.