When quoting content from another SE question/answer, is it necessary to also reference the user's profile as a separate link?

From [this](https://superuser.com/a/961430/175382) answer:

> Source: [Change comment character in notepad++](http://stackoverflow.com/a/24259865/3536342) by [rafiki](http://stackoverflow.com/users/3226989/rafiki)

as opposed to this:

> Source: [Change comment character in notepad++](http://stackoverflow.com/a/24259865/3536342)