Official website Department of State: Bureau of Intelligence and Research—Intelligence Community profile The Office of Strategic Services: America's First Intelligence Agency—A brief official history on the Central Intelligence Agency's Web site.
상원청문회… 최고 정보관련 기관장 5명의 증언 조선일보 2010-02-04 공식 웹사이트 Department of State: Bureau of Intelligence and Research—Intelligence Community profile The Office of Strategic Services: America's First Intelligence Agency—A brief official history on the Central Intelligence Agency's Web site.