Sources
- Association of Commercial Broadcasters and Audiovisual Services (VPRT)
- Commission on Concentration in the Media (KEK)
- Federal Constitutional Court (Verfassungsgericht)
- Federal Network Agency (Bundesnetzagentur)
- German Advertising Standards Council (Deutscher Werberat)
- German Journalists Association (DJV)
- German Journalists Union (DJU)
- German Press Council (Deutscher Presserat)
- Medienanstalten
- Ministries for Culture in the Länder, for instance Ministry for Family Children,