APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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