Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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