[drdaeman]

My apologies, my perception of LLMs is somewhat skewed, because I primarily think of conversation agents.

It's unnatural in a conversation. When we're talking about, say, Superman, we don't ever say that it's "a registered trademark of DC Comics, Inc." With obligatory exceptions for comical or satirical effects, or if we're specifically talking about trademarks or copyrights, etc. And of course when we're talking about robots we don't normally give any nods to Karel Čapek.

I believe that, same as humans, LLMs already try to provide references when requested, or if the style/format (such as lecture) prompts for having them. Just remember that famous anecdote where a lawyer used ChatGPT and it wrote a speech and provided believable references (then judge threw this out of court because quality/reliability is another problem - which is out of scope, though).