@phdthesis{UNY26606,
           month = {July},
          author = {Hapsari Ika Pertiwi},
           title = {PENGEMBANGAN GAME EDUKASI SEBAGAI SUMBER BELAJAR MANDIRI
BERBASIS JOYFUL LEARNING MATERI PELUANG
SISWA KELAS XI SMA},
            year = {2015},
          school = {UNY},
             url = {http://eprints.uny.ac.id/26606/}
}