Cita APA (7th ed.)

Welles, S. (1943). The world of the four freedoms. Columbia University Press.

Cita Chicago (17th ed.)

Welles, Sumner. The World of the Four Freedoms. New York: Columbia University Press, 1943.

Cita MLA (9th ed.)

Welles, Sumner. The World of the Four Freedoms. Columbia University Press, 1943.