Normally he has a witty comment about it, such as:
“As with anything you find on this site. Please use this on whatever you dang well please. Preferably big fancy corporate projects where you tell your boss this was all your idea and you get a big raise.”
I would say he would love a reference link, but that is up to you. As with your specific case, there is a reference URL for that snippet, therefore I would check with that site as well.