Hoffman, D. E. (1993). Scarface Al and the crime crusaders: Chicago's private war against Capone. Southern Illinois University Press.
Chicago-čujuhus (17. p.)Hoffman, Dennis E. Scarface Al and the Crime Crusaders: Chicago's Private War Against Capone. Carbondale: Southern Illinois University Press, 1993.
MLA-čujuhus (9. p.)Hoffman, Dennis E. Scarface Al and the Crime Crusaders: Chicago's Private War Against Capone. Southern Illinois University Press, 1993.
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