::I don't know the exact rule, but there is a guideline about this, because I have been told this in GA reviews. The point of it is to keep the infobox as consice as possible. But think about it this way, usually writers and relase dates, etc are already sourced in the credits section or release history section. So its no need to re-cite them. I don't believe Slow Dance or the other article you were working on have credits sections. So instead of adding citations to the infobox, look at an article such as [[Hey Daddy (Daddy's Home), utilizing the credits & personnel section instead of citing the infobox.