Unfortunately, many people treat citations as a formality rather than something to help someone judge credibility. I try to cite as specifically as possible. Cite the page if possible (and which column if available), section if possible, heck, the paragraph or line number if available. That makes checking easy. This was common when I worked at the USPTO as a patent examiner, but wasn't standard practice when I was in academia.

Previous comment of mine on this issue (including a bit about how to make URLs more specific): https://news.ycombinator.com/item?id=23897686