Linder, Douglas O. "Meet the Haymarket Defendants."Archivado el 13 de diciembre de 2010 en Wayback Machine. Famous Trials: The Haymarket Riot Trial (State of Illinois v. Albert Spies, et al.). University of Missouri-Kansas City (UMKC) School of Law. Accessed November 18, 2008.
Linder, Douglas O. "Meet the Haymarket Defendants."Archivado el 13 de diciembre de 2010 en Wayback Machine. Famous Trials: The Haymarket Riot Trial (State of Illinois v. Albert Spies, et al.). University of Missouri-Kansas City (UMKC) School of Law. Accessed November 18, 2008.