Powers, G. Black union power in the steel mills: George Powers. A freedomways reader : Afro-America in the seventies.(1977).
Citazione stile Chigago Style (17a edizione)Powers, George. "Black Union Power in the Steel Mills: George Powers." A Freedomways Reader : Afro-America in the Seventies.(1977) .
Citatione MLA (8a ed.)Powers, George. "Black Union Power in the Steel Mills: George Powers." A Freedomways Reader : Afro-America in the Seventies.(1977), .
Attenzione: Queste citazioni potrebbero non essere precise al 100%.