Crediting Composers

I wasn't too sure where I could post this so It'll just go here.

I uploaded a score that was a combination of the music in the trailers for Star Wars Episodes 7, 8, and 9. It was turned private and I don't know if I ever had the ability to upload it in the first place but that's not the problem. I need to know how to credit them because most trailer music is made by a combination of people and/or companies. Is there a way to credit a piece as having multiple composers or am I just going to have to wait until a feature like that gets implemented? The file is what I have right now.