Cita APA

Welles, S. (1943). World of the four freedoms. New York: Columbia University Press.

Citación estilo Chicago

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

Cita MLA

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