I agree with Gintautas in that bachelor's thesis gets 344 000 hits on Google while bachelor's paper gets only 6190 hits. Bachelor's paper only gets 6220 hits, also eliminating it. Google also shows that degree should not incuded. You can see from http://en.wiktionary.org/wiki/thesis that degree is already included in the concept of thesis. Unfortunately, dissertation is usually restricted to a thesis presented for an advanced degree, esp. a PhD. Master's usually still uses thesis.