Google’s Matt Cutts answers the question via YouTube video about where to place your link or links from your sources:
I like to put them where they make the most sense. For example, if I quote something from another source, I separate the content from that post like so.
When building a new site or creating new content, the notion of external linking is often a matter of concern for search engine optimization professionals. If there’s a best practice when it comes to external linking, particularly for bloggers, the answer is this – be considerate of those reading your material. – See more at: http://www.websitemagazine.com/content/blogs/posts/archive/2013/07/03/link-early-link-often.aspx
To me, it wouldn’t make much sense to put that quote at the bottom of this post, nor at the top. It seems to fit right where it is.