Cita APA (7a ed.)

Friedrich, O. (1995). Before the deluge: A portrait of Berlin in the 1920s. Harper Perennial.

Cita Chicago Style (17a ed.)

Friedrich, Otto. Before the Deluge: A Portrait of Berlin in the 1920s. Nueva York: Harper Perennial, 1995.

Cita MLA (8a ed.)

Friedrich, Otto. Before the Deluge: A Portrait of Berlin in the 1920s. Harper Perennial, 1995.