The general rule for crew and cast credits is to use the onscreen credits. But what about/can we make an exception for failed tv pilots (that dont have on screen credits)? Can we use articles from websites like thewrap/entertainment weekly, etc.?

Example credits can be found here for the failed tv pilot "Heavenly":
https://www.thewrap.com/fall-tv-pilots-cw-2011/
https://www.themoviedb.org/tv/293452-heavenly

But not in the leaked onscreen credits: https://www.youtube.com/watch?v=lCy-JNcv6uk