@phdthesis{UNY2300,
           month = {July},
          author = {PRATIWI YULI},
           title = {ANAKOVA DALAM RANCANGAN BUJURSANGKAR GRAECO LATIN },
          school = {UNY},
            year = {2010},
             url = {http://eprints.uny.ac.id/2300/}
}