Hi Chris
There is a way to do that in the "source help files"
If you are using the same source on multiple profiles, especially if you have more information about the source than can comfortably fit in a traditional citation — such as multiple websites or repositories where it might be found — or you may want to collaborate with others who are using that source, you may want to create a free-space profile of it. SeeProfiles of Sources.
Hope this helps :)
Wendy