Cita APA (7th ed.)

(1972). Before the deluge: A portrait of Berlin in the 1920's / Otto Friedrich. Harper & Row.

Cita Chicago (17th ed.)

Before the Deluge: A Portrait of Berlin in the 1920's / Otto Friedrich. New York [u.a.]: Harper & Row, 1972.

Cita MLA (8th ed.)

Before the Deluge: A Portrait of Berlin in the 1920's / Otto Friedrich. Harper & Row, 1972.