@phdthesis{UNY2227,
           month = {November},
          author = {- Tambah Prayoga},
           title = {PERBANDINGAN SEGIEMPAT SACCHERI PADA GEOMETRI EUCLID DAN GEOMETRI NON EUCLID},
          school = {UNY},
            year = {2011},
             url = {http://eprints.uny.ac.id/2227/}
}