So far I thought von is equivalent to by when it refers to an author / creator of work, but now I'm confused as I saw some text to use durch.
How do I properly refer to the creator of a work?
People were created by God. (Die Menschen sind von Gott geschaffen.)
The book is written by Mark Twain. (Das Buch ist von Mark Twain geschrieben.)
The film was directed by Quentin Tarantino. (Der Film wurde durch Quentin Tarantino eingeführt.)