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Feel free to use this example of how not to site an image in any lesson that you teach to students about providing proper attribution.
Between great public domain image sources like Pixabay and Creative Commons image search tools there are few occasions when students should have to resort to claiming fair use to use a copyrighted image. If they do end up at that step, they should at least give proper credit to the owner of the image.
The Flickr CC Attribution Helper created by Alan Levine offers an easy way to properly format citations for images that you find on Flickr. I created a tutorial for that handy tool. You can see the tutorial here.