I googled about this and it looks like <figure>
and <figcaption>
should do the job:
<figure>
<blockquote cite="https://developer.mozilla.org/samples/html/figure.html">
Quotes, parts of poems can also be a part of figure.
</blockquote>
<figcaption>MDN editors</figcaption>
</figure>
https://developer.mozilla.org/samples/html/figure.html
<figure>
<blockquote cite="http://www.w3.org/html/wg/drafts/html/master/grouping-content.html#the-figure-element">
The figure element represents some flow content, optionally with a caption,
that is self-contained and is typically referenced as a single unit from the
main flow of the document.
</blockquote>
<figcaption>asdf</figcaption>
</figure>
http://www.w3.org/html/wg/drafts/html/master/grouping-content.html#the-figure-element