Cita APA (7th ed.)

United States. Central Intelligence Agency. (2010). The CIA world factbook 2011. Skyhorse Publishing.

Cita Chicago (17th ed.)

United States. Central Intelligence Agency. The CIA World Factbook 2011. New York: Skyhorse Publishing, 2010.

Cita MLA (9th ed.)

United States. Central Intelligence Agency. The CIA World Factbook 2011. Skyhorse Publishing, 2010.