Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page F. W. Murnau:

"

After World War I ended, Murnau returned to Germany, where he soon established his own film studio with actor Conrad Veidt. His first feature-length film, The Boy in Blue (1919), was a drama inspired by the Thomas Gainsborough painting and by Oscar Wilde's novel[1] The Picture of Dorian Gray. He explored the theme of dual personalities, much like Robert Louis Stevenson's Dr. Jekyll and Mr. Hyde, in Der Janus-Kopf (1920) starring Veidt and featuring Bela Lugosi.[citation needed]