Cita APA (7th ed.)
Barron, J. KGB: The Secret Work of Soviet Secret Agents. Hodder and Stoughton.
Cita Chicago (17th ed.)
Barron, John. KGB: The Secret Work of Soviet Secret Agents. Londres, Inglaterra: Hodder and Stoughton.
Cita MLA (9th ed.)
Barron, John. KGB: The Secret Work of Soviet Secret Agents. Hodder and Stoughton.
Atenció: Aquestes cites poden no estar 100% correctes.