@unpublished{UNY2514,
          author = {Reny Amalia Widiyanti},
           title = {Metode-metode Pembelajaran yang Digunakan Guru Matematika SMP Negeri Kota Yogyakarta},
           month = {January},
            year = {2009},
          school = {UNY},
             url = {http://eprints.uny.ac.id/2514/}
}