Gregory, G. H. (2002). Alcatraz screw: My years as a guard in America's most notorious prison. University of Missouri Press.
Chicago-Zitierstil (17. Ausg.)Gregory, George H. Alcatraz Screw: My Years as a Guard in America's Most Notorious Prison. Columbia, MO: University of Missouri Press, 2002.
MLA-Zitierstil (9. Ausg.)Gregory, George H. Alcatraz Screw: My Years as a Guard in America's Most Notorious Prison. University of Missouri Press, 2002.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.