Still uncertain on how to do sources from Pixiv, so you can find the source here: http://www.pixiv.net/member_illust.php?mode=medium&illust_id=5134666

You use the direct link to the image (like someone after you did). When you're viewing the full image, either use danbooruup, or right click > view image and upload from there.

Make sure the URL always ends in a .png or .jpg or .gif, etc.

Ah, I getcha. So basically, source the pic itself, and not the artist. Thanks, that helps alot.