Bradford, R., & Tracy, S. C. (2008). John Henry: Roark Bradford's novel and play. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Bradford, Roark, agus Steven C. Tracy. John Henry: Roark Bradford's Novel and Play. Oxford: Oxford University Press, 2008.
Lua MLA (9ú heag.)Bradford, Roark, agus Steven C. Tracy. John Henry: Roark Bradford's Novel and Play. Oxford University Press, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.