APA (7th ed.) Citation

Sontag, R. J. (1971). A broken world: 1919-1939. Harper & Row.

Chicago Style (17th ed.) Citation

Sontag, Raymond J. A Broken World: 1919-1939. New York [u.a.]: Harper & Row, 1971.

MLA (8th ed.) Citation

Sontag, Raymond J. A Broken World: 1919-1939. Harper & Row, 1971.