Go to the right-pointing arrow in the lower right and click on it. When the window pops up, click on "BBCode" at the top, copy the address that shows up, and paste it directly into your post.
T206 Devore Front 1 by
Geno Wagner, on Flickr
You can eliminate the "T206 Devore Front 1 by Geno Wagner on Flickr" part by deleting that part of the address after you post it, from the second "