Cita APA

(1961). CIA, National Intelligence Estimate, NIE 11-61, Probable Intelligence Warning of Soviet Attack on the US, April 6, 1961, Top Secret.

Citación estilo Chicago

CIA, National Intelligence Estimate, NIE 11-61, Probable Intelligence Warning of Soviet Attack on the US, April 6, 1961, Top Secret. 1961.

Cita MLA

CIA, National Intelligence Estimate, NIE 11-61, Probable Intelligence Warning of Soviet Attack on the US, April 6, 1961, Top Secret. 1961.