Correct way to attribute flickr photos in wordpress?

In several of my posts I am using a single photo as my thumbnail/teaser photo found on the homepage, as well in the post itself. Currently I'm only attributing the photo found in the post by linking the image to where it's respectively found on Flickr. Should I also attribute the (same) Flickr photo (found in the thumbnail on the homepage) at the ending of the post, or is attributing the photo found in the post good enough?

bump..

anybody with any experience on this?

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