Powers, G. Black union power in the steel mills: George Powers. A freedomways reader : Afro-America in the seventies.(1977).
Lua i Stíl Chicago (17ú heag.)Powers, George. "Black Union Power in the Steel Mills: George Powers." A Freedomways Reader : Afro-America in the Seventies.(1977) .
Lua MLA (8ú heag.)Powers, George. "Black Union Power in the Steel Mills: George Powers." A Freedomways Reader : Afro-America in the Seventies.(1977), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.