I've done that with the rough Q&A tool I made. I include links to websites or documents not so much for verification, but because I work with government info and the devil's in the details. The Q&A is more like a smart search engine, with the summarized answer being a nice bonus.
Although a lot of people are working on hallucination reduction, I think we're a long way off from that in the general case. So having the ability to point to a real piece of data, outside the model, is important for applications where accuracy matters.