Walsh, T. J. (1973). Protecting your business against espionage. AMACOM.
Cita Chicago Style (17a ed.)Walsh, Timothy J. Protecting Your Business Against Espionage. New York: AMACOM, 1973.
Cita MLA (9a ed.)Walsh, Timothy J. Protecting Your Business Against Espionage. AMACOM, 1973.
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