Maybe I'm reading between the lines too much, but this seems to be creating a problem by being overly-general.

Certainly, if you discuss or analyse an article or document which is available online, link to it for the benefit of your audience (and the original author). (Exceptions like discussing a hate crimes page and not wanting to give it google-juice are fine, just let us know you're doing it.)

But the OP seems to blur this with other sources not already available on the web (or, presumably for example, behind a paywall). Are you asking for these to be uploaded, which is potentially copyright infringement and at least may go against the original author's intent?

If I review a book, do you need the primary source included?