You probably don't need this, but here's another guide just in case. The site as a whole is an amazing resource for AC:NL in general, so give it a look if you need anything else!
Even if you're one who doesn't like guides, I don't think it's cheating in this case. If you were really looking for art and didn't have every piece memorized, you'd probably use an art catalog or something. I try to just look up the piece (on a guide, I don't know all the names) and try to decide if it's accurate without reading the "it's fake if" stuff.