Cita APA (7a ed.)

Friedrich, O. (1973). Before the Deluge: A Portrait of Berlin in the 1920's (1. Aufl.). Avon Books.

Cita Chicago Style (17a ed.)

Friedrich, Otto. Before the Deluge: A Portrait of Berlin in the 1920's. 1. Aufl. New York: Avon Books, 1973.

Cita MLA (8a ed.)

Friedrich, Otto. Before the Deluge: A Portrait of Berlin in the 1920's. 1. Aufl. Avon Books, 1973.