Miscellaneous Sites
- Abandomoviez.net (Spanish)
- Actors Compendium
- All Movie Guide
- BigScreen.com - Information, Photos, and Videos
- biosAgenda (Dutch)
- Borrowing Tape - Is Fritz Lang's M Direct Cinema?
- Cine.gr (Greek)
- Cinemafantastique
- CineMagia.ro Info - (Romanian)
- CINeol (Spanish)
- cineyteatro.es - Info, synopsis, commentary, awards, photos (Spanish)
- crimelibrary.com - Fritz Haarmann: The Real "M"
- Cyberroach - Fritz Lang's M
- DBCult Film Institute
- Filmbericht.de (German)
- Filmportal - Synopsis, Photos, Trailers, Articles, other Materials (German)
- IMCDb.org: cars, bikes, trucks and other vehicles seen in this production
- kruela.ciberanika.com - article (Spanish)
- MovieMaze.de (German)
- MovieMeter (Dutch)
- moviepilot.de (German)
- Moviereporter.net (German)
- MUBI: The global community for film lovers
- myFILM.gr (Greek)
- New Video Film-Lexikon (German)
- SevenArt.gr (Greek)
- SoundtrackCollector - Soundtrack Information
- Spielfilm.de Filminfo (German)
- Starlog - Curt Siodmak Interview [Lee Server] (January 1990)
- Stopklatka (Polish)
- TCM.com - Turner Classic Movies
- The-CloseUp.de (German)
- TVGuide.com
- Virtual History
- Wikipedia
- YoVideo (French)
- Zelluloid.de (German)
Photographs
- Article and story board of the movie.
- Cine.gr - Image Gallery
- CINeol - Image gallery
- moviepilot.de - Photos
- MovieQuiz - Image Gallery
- Moviereporter - Image Gallery
- MovieScreenShotsBlog - Image Gallery
- myFILM.gr - Photo gallery
- SevenArt.gr - Image gallery
- Video.olympus.ru - Pictures
- Virtual History - Gallery
- Carteles de cine
- CineMaterial.com - Photo Gallery
- filmposter-archiv.de - German movie poster
- SevenArt.gr - Greek poster
