WWW LC auth. file, 5-11-2002 (Lang, Fritz; b. 1890, Vienna, Austria, d. 1976, Hollywood; b. name Lang, Friedrich Christian Anton; director, screenwriter, also producer)

Mientras Nueva York duerme [Vídeo], 1995 carátula (director, Fritz Lang)

Halliwell's film guide, de Leslie Halliwell, 1994

Film Index International, 1997 (Fritz Lang ; alternative name, Friedrich Christian Anton Lang ; direction ; cast ; scripting ; b. 1890 ; d. 1976)