I've just done a huge run-around to track down the source of this image after I found it posted without credit on Tumblr. The search-by-image function on Google didn't even bring up this deviation, and I don't know what that is about.
Anyway, you may want to try that search-by-image because it's all over the web and I'm assuming in most of those cases you didn't give permission and it didn't look like it was credited. Sorry to be the bringer of bad news. I'll be reblogging the tumblr post and adding your credit.