Make each source into a link to the source
Make each source into a link to the source

Since a source is a url it makes sense to actually link to the source
when displaying it to the user.

mysociety/popit,Sinar/popit,mysociety/popit,openstate/popit,mysociety/popit,Sinar/popit,openstate/popit,openstate/popit,Sinar/popit,Sinar/popit,openstate/popit,mysociety/popit,mysociety/popit