↑Hahn, Ronald M. ja Jansen, Volker: Die 100 besten Kultfilme. Heyne Filmbibliothek, München 1998, ISBN 3-453-86073-X, S. 396 ((saksaksi)); while various other figures have been quoted, production cost was most likely between 3 and 5 million RM
↑ abFritz Langin Metropolis-elokuvan kohtauksia löytyi. Helsingin Sanomat, 7.7.2008, s. C1.
↑One of these films was Metropolis (1927), which brought Lang to the attention of Adolf Hitler. After the Nazis took power in Germany, Joseph Goebbels offered Lang the position of supervisor of German film production; both Goebbels and Hitler admired his work and were willing to overlook the fact that Lang's mother was Jewish. Viite: D. A. Schmitt (toim.): Lang, Fritz (Vol. 103): Introduction. (Kritiikki) 1998. eNotes.com: Gale Group. Viitattu 7.2.2008. (englanniksi)