Treat it like a lazy teenager. " please hyperlink to your sources or otherwise attach your references in PDF format for review" helps to dramatically lower "hallucination" (aka bullshitting) across all the models.

Much like a lazy teenager, if there is an apparent risk that you'll double check the work, it works a bit harder, vs if the teacher is known to grade papers at 11pm on a Sunday.

There's my $2 tip for the day.