@unpublished{UNY2502,
           title = {Aplikasi Pengendalian Kualitas Statistik Produksi Susu di PT. Sari Husada Tbk. Klaten.},
          school = {UNY},
          author = {Widihati Tri},
            year = {2005},
             url = {http://eprints.uny.ac.id/2502/}
}