Wikisource has a User Page for User Wikisource 2

If you'd like to advertise that you also have a Wikisource account, place the following code on your page:
((User WSUP)) Or, if you'd like to hardcode the username (for instance, if the userbox will be on a subpage of your userspace), you can type in either
((User WSUP|UserNameHere)) or
((User WSUP|user=UserNameHere))

See also