Hi,
You will find an interesting topic on this here: What are your strategies for spotting AI writing?.
I’m afraid this isn’t a game you can really win What are your strategies for spotting AI writing? - #20 by phyde1001, and What are your strategies for spotting AI writing? - #22 by phyde1001.
Ultimately if you check for thinks like source= as noticed above you are only going to hurt the less deceptive or less tech savvy which I guess is more of an issue in some creative subjects like writing essays.