Give content on my blog credit where credit's due, plugin?

So I collect/create funny/stupid images and videos from around the internet and post them on my blog (like most people).

Sometimes there’s like an entire article(?) that I would like to just put on my blog.

<a href="http://www.buzzfeed.com/virginmobilelive/27-cats-that-just-cant-handle-it-5l87?b=1"></a>

I could just provide a link to this hilarious collection of cat gifs, but I’d prefer to embed it in my own posts/pages and then have a footnote, “Source: Buzzfeed” or something. I just don’t want people to leave my site.

Like even Buzzfeed has little captions after individual images “via reddit” or “via imgur”

Basically, is there a plugin for this, or something in WordPress core? I’m a bit of a noob.

Thanks!