APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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