Richelson, J. (1995). A century of spies: Intelligence in the twentieth century. Oxford University Press.
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Chicago-čujuhus (17. p.)
Richelson, Jeffrey. A Century of Spies: Intelligence in the Twentieth Century. New York: Oxford University Press, 1995.
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MLA-čujuhus (9. p.)
Richelson, Jeffrey. A Century of Spies: Intelligence in the Twentieth Century. Oxford University Press, 1995.
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