(1972). Before the deluge: A portrait of Berlin in the 1920's / Otto Friedrich. Harper & Row.
Lua i Stíl Chicago (17ú heag.)Before the Deluge: A Portrait of Berlin in the 1920's / Otto Friedrich. New York [u.a.]: Harper & Row, 1972.
Lua MLA (8ú heag.)Before the Deluge: A Portrait of Berlin in the 1920's / Otto Friedrich. Harper & Row, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.