The footer extension would work like a blockquote, starting by a double
^^ and would translate to a footer tag:
> This is a blockquote > ^^ This is a ""citation for name""
would translate to html:
<blockquote><p>This is a blockquote</p> <footer>This is a <cite>citation for a name</cite></footer> </blockquote>
A footer can be multiline as a blockquote:
> This is a blockquote > ^^ This is a multiline > ^^ footer with a ""citation for name""