*sniffles*
I never make the lists,...

It's probably just as well.
Refusing to credit work you didn't do to the original creator is pig headed.
You got the pic from somewhere, it had a link.

If you have lost the link, tineye.com is your friend.
Copy/paste your pic into their search bar and they will give a link you can use to source the pic.

Take that link and the markup language to make it a link around the word source.
[source](whatever link)
This is not too much to ask, imo.
Or decline rewards, up to you.
'The community' will flag you for not properly sourcing work you didn't do.
When we have enough hp to do the job.