Author RSS feed underneath the entry

I have a multi-author blog and I would like to include a link to the author’s feed immediately before or after the blog entry–I imagine it would be in The Loop. I know there is a template tag that will generate a list of all authors with links to their respective feeds, but I just want to have a link for the feed for the author who wrote the post. How would I write the code? I thought an answer was provided here:
https://www.ads-software.com/support/topic/83192?replies=5#post-426160
but that code doesn’t seem to work.