I think it is essential to cite sources, whether they are texts or images. It is the best way to combat plagiarism.
There is only one aspect that I would like to unify in the specific case of images.
Not long ago I published an article in the community @fulldeportes in which I cited an image by referring to its source (in this case Wikipedia) directly quoting the image page.
However, the community administrators have established that the exact rule is not to cite the page of the image but the page containing the image.
Excellent article. Regards
Thank you so very much for adding this very important note! I had it in my mind to explain this but it totally crossed my mind.
I have updated the post to include this in. I really appreciate you commenting and adding your feedback. I too did the same thing you did when first joining and a curation group taught me the same thing ;)