Wires, R. (1999). The Cicero spy affair: German access to British secrets in World War II. Praeger.
Lua i Stíl Chicago (17ú heag.)Wires, Richard. The Cicero Spy Affair: German Access to British Secrets in World War II. Westport, Conn.: Praeger, 1999.
Lua MLA (9ú heag.)Wires, Richard. The Cicero Spy Affair: German Access to British Secrets in World War II. Praeger, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.