I wrote an expository term paper in graduate school and posted it on my website, never trying to get it into a journal. Google Scholar says it now has 19 citations from various countries ("widely" is of course relative; what I mean is that this is more citations than my other publications have).
Since the article apparently resonated with an audience, should it now appear on my CV? If so, should I describe it with the name of the professor or course for which I wrote it, or just a title with no venue?