One of the problems with Internet links is that the links can disappear or change. I often copy the content, but link back to the source to acknowledge the source.
I have just installed a link checking utility that checks links every 3 days and puts a line through broken links or unresponsive websites. This retains my content but keeps the crossed out link for posterity
Some seem to link to content on my Blog. They add to my To Do list.
David
