APA (7e ed.) Bronvermelding

Gregory, G. H. (2002). Alcatraz screw: My years as a guard in America's most notorious prison. University of Missouri Press.

Chicago (17e ed.) Bronvermelding

Gregory, George H. Alcatraz Screw: My Years as a Guard in America's Most Notorious Prison. Columbia, MO: University of Missouri Press, 2002.

MLA (9e ed.) Bronvermelding

Gregory, George H. Alcatraz Screw: My Years as a Guard in America's Most Notorious Prison. University of Missouri Press, 2002.