"Bethelfilm". Lexikon der Filmbegriffe (in German). Kiel, Germany: University of Kiel. 3 March 2012. Archived from the original on 2 December 2016. Retrieved 2 December 2016.
"Bethelfilm". Lexikon der Filmbegriffe (in German). Kiel, Germany: University of Kiel. 3 March 2012. Archived from the original on 2 December 2016. Retrieved 2 December 2016.