I read once again the license, and it says: Attribution. You must attribute
the work in the manner specified by the author or licensor (but not in any
way that suggests that they endorse you or your use of the work).

If you click right > Description on this photo (and any other photos I use
based on a CC license, you will at “Description” the link to the Flickr page
where it was posted: http://www.flickr.com/photos/nenortas/2333593992/ )

I considered that this way I comply with the license. But, if you consider
that this is not enough, please let me know in which way do you want to show
the owner of the photo, or if you want me to delete it from the post, and I
will comply with your terms.

http://creativecommons.org/licenses/by-nc/2.0/deed.en