APA (7th ed.) Citation

United States. Central Intelligence Agency. (1999). The biological & chemical warfare threat (Rev. ed.). [Central Intelligence Agency].

Chicago Style (17th ed.) Citation

United States. Central Intelligence Agency. The Biological & Chemical Warfare Threat. Rev. ed. [Washington, D.C.?]: [Central Intelligence Agency], 1999.

MLA (9th ed.) Citation

United States. Central Intelligence Agency. The Biological & Chemical Warfare Threat. Rev. ed. [Central Intelligence Agency], 1999.