@phdthesis{UNY2015,
            year = {2010},
           title = {PENGEMBANGAN SISTEM INFORMASI ILMUWAN MATEMATIKA},
          author = {Ratna Dewi Lestyorini},
           month = {July},
          school = {UNY},
             url = {http://eprints.uny.ac.id/2015/}
}