Johnson, W. R. (2009). Thwarting enemies at home and abroad: How to be a counterintelligence officer. Georgetown University Press.
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Chicago Style (17th ed.) Zitazioa
Johnson, William R. Thwarting Enemies at Home and Abroad: How to Be a Counterintelligence Officer. Washington, D.C.: Georgetown University Press, 2009.
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MLA (9th ed.) Zitazioa
Johnson, William R. Thwarting Enemies at Home and Abroad: How to Be a Counterintelligence Officer. Georgetown University Press, 2009.
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