I wrote a thesis for my undergraduate degree - it was published but not in a journal. Is it still relevant to cite?
If the research was original and academic, then I would say keep it in there if it's relevant to the role that you see yourself working in. If it was a team effort, make sure you cite it as such. Since it wasn't officially published, I'd suggest linking to it online (and hosting it somewhere if it isn't already hosted by your academic institution).

Of course, I'm not really authoritative on this type of thing, but if I were evaluating prospective employees, I'd love to be able to see relevant examples of their work even if they weren't formally published.